| 单词 | operculum |
| 例句 | Amphibians also have an auricular operculum, which is an extra bone in the ear that transmits sounds to the inner ear. Fundamentals of Biology 2015-01-01T00:00:00Z Water is drawn over gills that are located in chambers covered and ventilated by a protective, muscular flap called the operculum. Concepts of Biology 2013-04-25T00:00:00Z When it approaches, the worms retract, vanish into their homes and slam shut an organ called an operculum — just like a door. To See the Best Christmas Trees, You’ll Need Scuba Gear 2017-12-05T05:00:00Z He startled periwinkles by tapping them on the operculum, a sort of trapdoor on their shell, and waited. The Science of Humming to Draw Snails From Their Shells 2016-08-08T04:00:00Z Taste information is then transmitted through several brain regions before arriving in the primary taste cortex, which is made up of the frontal operculum and the anterior insula. Tricking Taste Buds but Not the Brain: Artificial Sweeteners Change Brain s Pleasure Response to Sweet 2013-09-05T18:45:00.580Z And then just like that, it evaporated into its burrow and slammed its operculum/trap-door closed. The Overlooked Joy of the Christmas Tree Worm 2012-06-04T11:15:17.153Z Shell globose, wrinkled, olive; spire prominent, acute, the whorls ventricose; margin of the aperture thick, fulvous, grooved; umbilicus small, linear, near the middle of the inner lip; operculum shelly. Zoological Illustrations, Volume III or Original Figures and Descriptions of New, Rare, or Interesting Animals 2012-04-20T02:00:06.887Z It is only known that these shells, like the Paludin�, are furnished with an operculum. Zoological Illustrations, Volume II or Original Figures and Descriptions of New, Rare, or Interesting Animals 2012-04-19T02:00:34.283Z If not preserved in an envelope the calyptra and operculum are very apt to fall off and become lost. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 3 "Helmont, Jean" to "Hernosand" 2012-04-14T02:00:23.707Z Capsule greenish, rupturing by irregular narrow teeth or by a fragmentary operculum. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Some authors consider them to be jaws; others, opercula. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z But textural metaphors also activated the parietal operculum, a region of the brain involved in feeling different textures through touch. Metaphors Make Brains Touchy Feely 2012-02-07T22:02:48Z Shell globose, very smooth, olive; spire depressed; margin of the aperture thick, fulvous, grooved; umbilicus small, contracted, placed near the base; operculum shelly. Zoological Illustrations, Volume II or Original Figures and Descriptions of New, Rare, or Interesting Animals 2012-04-19T02:00:34.283Z At one end a cap-like portion of this forms a detachable operculum, in the middle of which is a minute opening, the micropyle. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Anther without operculum, the cells adnate to the top of the column and often continuous with the beak of the stigma. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Bill bending from the base; tufts more or less conspicuous or wanting; facial disc complete; ears large, covered by an operculum; legs feathered to the claws. British Birds in their Haunts 2011-11-23T03:00:23.677Z The many things of which the compounds are made must not fill the ampulla completely, lest when boiling they rise into the operculum. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z This is the most common of the two shells of this genus, which have their mouths closed by a shelly operculum. Zoological Illustrations, Volume II or Original Figures and Descriptions of New, Rare, or Interesting Animals 2012-04-19T02:00:34.283Z The male again moved into position at the lower left edge of the operculum of the female as at Station 29-G. Fishes of the Big Blue River Basin, Kansas 2011-10-15T02:00:26.927Z Between it and the otostapes is a small disc, usually ossified, the operculum, which normally fits loosely in a portion of the fenestral membrane, and is developed from the otic capsule. The Ancestry of Modern Amphibia: A Review of the Evidence 2011-09-10T02:00:27.077Z Shell ventricose, with short spire, and wide aperture; no varices and no operculum; foot very broad, with projecting anterior angles; siphon long. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z In a similar way the spout of the operculum is joined by linen covered with lute to another glass ampulla which receives the distilled aqua. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z I do not know if it was the operculum, for my knowledge of such things is small; but I did feel this was the only twelfth birthday which had come to me for many years. The Sea and the Jungle 2011-08-30T02:00:30.350Z Both are furnished with opercula, but the mouth in the first is more or less oval and frequently notched in front, while in the latter it is rounded and entire. Sea-Weeds, Shells and Fossils 2011-08-20T02:00:11.557Z The stapes has a large footplate, and its stylus articulates with the quadrate, but no true operculum or opercularis has been described in the Apoda. The Ancestry of Modern Amphibia: A Review of the Evidence 2011-09-10T02:00:27.077Z Eulima, foot well developed, with an operculum, animal usually free, but some live in the digestive cavity of Holothurians. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z C—Ampullae placed in the sand which is contained in a box, the spouts of which reach from the opercula into ampullae placed under them. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z This consists of gills supported on strong arches, the branchial arches, which in the Elasmobranch fishes are from five to seven in number and uncovered with any operculum, or lid. McClure's Magazine, Vol. 1, No. 1 2011-07-17T02:00:36.813Z It was shaped and ornamentally carved and painted to represent a wood-worm and inlaid along the rounded upper edge with opercula. The Whale House of the Chilkat 2011-05-23T02:00:09.800Z Although the stapes and otic region are readily visible in a number of labyrinthodonts and lepospondyls, no indication of an operculum seems to be reported among them. The Ancestry of Modern Amphibia: A Review of the Evidence 2011-09-10T02:00:27.077Z Visceral sac and shell coiled in one plane; foot divided transversely into two parts, posterior part bearing an operculum, anterior part forming a fin provided with a sucker. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z D—Ampullae likewise placed in sand which is contained in a box, of which the spouts from the opercula extend crosswise into ampullae placed under them. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z In one case the first occipital convolution sank nearly beneath the surface, the next occipital gyrus projecting over it, forming a parietal operculum. Degeneracy Its Causes, Signs and Results 2011-05-02T02:00:17.657Z They presented a slightly rounded surface, carved in low relief, painted in dull colors, inlaid with opercula and representing, as the name indicated, the dog salmon. The Whale House of the Chilkat 2011-05-23T02:00:09.800Z Since the remainder of the posterior wall of the otic capsule consists of cartilage, meeting the exoccipital, it may be that the opisthotic becomes the operculum in frogs. The Ancestry of Modern Amphibia: A Review of the Evidence 2011-09-10T02:00:27.077Z Foot broad, with two slender posterior appendages; operculum unguiculate. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z When the powerful vapour appears, the aqua gives off a kind of oil, and the operculum becomes red. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z The shell consists of six plates, with an operculum of four valves. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis To properly enclose the animal, and make it safe from enemies, an operculum, or lid, was so formed that when the animal retired into the shell this filled up the opening. Beautiful Shells of New Zealand An Illustrated Work for Amateur Collectors of New Zealand Marine Shells, with Directions for Collecting and Cleaning them When a capsule splits in two under the influence of the internal osmotic pressure, it may happen that the operculum or upper valve floats away in the liquid. The Mechanism of Life Cephalic disk enlarged anteriorly, forming an open tube posteriorly; shell external, thick, with prominent spire; no operculum. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z But, lest the vapours should escape from the ampulla and the operculum in that part where their mouths communicate, they are entirely sealed all round. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z According to Sir Richard Owen, the aptychus is an operculum developed in a part of the body corresponding to the hood of Nautilus. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The operculum is a solid, round, shelly one, with a greenish centre. Beautiful Shells of New Zealand An Illustrated Work for Amateur Collectors of New Zealand Marine Shells, with Directions for Collecting and Cleaning them These capsules are closed at the summit by a cap, forming an operculum, so that they sometimes appear as if formed of two valves. The Mechanism of Life Stylifer, the operculum is lost, animal fixed by a large proboscis which forms a pseudopallium covering the whole shell except the extremity of the spire, parasitic on all groups of Echinoderms. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Changed "the spout from the opercula extends" to "the spouts from the opercula extend" in the caption to the illustration on page 446. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z A middle course appears the more reasonable to the 513 present writer, who has divided the Siluridae of Cuvier into three families, with the following definitions:— Siluridae—ribs attached to strong parapophyses; operculum well developed. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" The interior is pearly, and the operculum is shelly, solid, and white. Beautiful Shells of New Zealand An Illustrated Work for Amateur Collectors of New Zealand Marine Shells, with Directions for Collecting and Cleaning them The presence of an operculum seems to have been of importance, as out of twelve specimens of Cyclostoma elegans which it thus furnished, eleven revived. The History of the European Fauna Shell ventricose, thin and smooth, with wide aperture; foot large and thick, without operculum. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z I may here remark that, in most sessile Cirripedes, the outside membrane connecting the operculum and shell, is regularly moulted. A Monograph on the Sub-class Cirripedia With Figures of all the Species. Sporangia furnished with rigid, unpolished stipes, blending above with the substance of the thick unpolished walls; the operculum thin, delicate, membranaceous. The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species This operculum may be the more readily seen when the ascus is coloured by a drop of tincture of iodine. Fungi: Their Nature and Uses Sporangium usually minute, broadly funnel-shaped, stipitate; operculum always more or less convex, rarely approaching a hemispherical shape, dehiscent in a regular circumscissile manner. The Myxomycetes of the Miami Valley, Ohio No ctenidium, but a pulmonary cavity; operculum with an apophysis. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The operculum fits the entrance to its shell like a trap door. Japanese Fairy World Stories from the Wonder-Lore of Japan Whelk: cut off its head and tail, throw away its operculum, mantle, &c., cut it in two, and put it on the sturgeon, adding vinegar. Early English Meals and Manners Supra-anal plate: a triangular sclerite covering the anal cavity above; present in many insects, sometimes in one sex only, often in both: see anal operculum. Explanation of Terms Used in Entomology The wall a thick, brownish membrane, externally smooth and variously colored, sometimes uniformly light or dark umber, sometimes dark brown below and brownish white above; the operculum brownish white, darkest in the center. The Myxomycetes of the Miami Valley, Ohio Visceral sac and shell small in proportion to the rest of the body, which cannot be withdrawn into the shell; foot elongated, fin-shaped, with sucker, but without operculum. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z When feeding, enjoying itself or moving around, its long neck and body are stretched out before it, armed with its hard operculum, which is like an iron shield, or the end of a battering ram. Japanese Fairy World Stories from the Wonder-Lore of Japan His enormous head is now seen to be apparently circular in outline, and we readily see how perfectly it would fill the opening of the burrow like an operculum. My Studio Neighbors Head of still later tadpole in horizontal section to show atrial chamber formed by operculum. int.g., internal gills. Text Book of Biology, Part 1: Vertebrata As the weather became cold they always hibernated, closing the mouth of the shell with a thin, firm covering, or operculum, of chalk, which, mixed with their slime, made a substance like plaster of Paris. Wild Nature Won By Kindness Shell turriculated, with numerous whorls; aperture and operculum oval; eyes at summits of tentacles; siphon long. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z From the hinder edge of the hyoid arch grows out the membranous operculum, in which develop later the opercular bones and branchiostegal rays. Form and Function A Contribution to the History of Animal Morphology Dehiscence takes place either by the upper portion of the capsule splitting into short teeth or falling away as a whole or in fragments as a sort of operculum. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Throughout the winter the creatures hybernate, shutting themselves up by their operculum whilst lying among dead leaves, or having fixed themselves by their glutinous secretion to a wall or tree. Herbal Simples Approved for Modern Uses of Cure The distinct operculum in most of the figures would preclude their representing a shark. Animal Figures in the Maya Codices Shell thin; operculum absent; tentacles bifid; foot secretes a float; pelagic. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z He could even, as we have noted before, find the homologue of the operculum in a flap which grows out from the hyoid arch in the embryo of birds. Form and Function A Contribution to the History of Animal Morphology The capsule, the wall of which bears rudimentary stomata, has a small operculum but no peristome. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" The operculum,21 of a seashell, or very occasionally some bright object, may set off the knob. The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir In some forms there is an operculum, by means of which the opening of the shell can be closed when the animal is retracted. Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 Shell ventricose, with elongated aperture, and short spire; proboscis and siphon long; operculum with marginal nucleus. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Rathke's discoveries relative to the development of the jaws, the hyoid and the operculum, enabled him to make short work of the homologies proposed for them by the transcendentalists. Form and Function A Contribution to the History of Animal Morphology The capsule opens explosively in dry weather, the operculum and spores being thrown to a distance. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" At the other end of the girdle is a loop large enough to admit the operculum, which on being slipped into this loop retains the garment in position. The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir This history was told me, and the nest with its operculum shewn me by the late Dr. Butt of Bath, who was some years physician in Jamaica. Zoonomia, Vol. I Or, the Laws of Organic Life Summit of spire heterostrophic; a projection, the mentum, between head and foot; operculum present. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z From the hinder edge of the second visceral arch there develops, as Rathke had seen, a fold which is comparable with the operculum of fish. Form and Function A Contribution to the History of Animal Morphology A distinct operculum is usually detached by the help of the annulus, and its removal may leave the mouth of the capsule widely open. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" They have the shell coiled into a flat spiral, the mouth being furnished with a very curious, thick, and solid lid or "operculum." The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science One I found on the bushes with an operculum--this I gave to Wall. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 2 Shell ovoid, with short spire and folded columella; foot small, no operculum; siphon short. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z These are the bones connected with respiration—the operculum, the branchiostegal rays, the branchial arches, and others. Form and Function A Contribution to the History of Animal Morphology These cleistocarpous forms are now recognized as related to various natural groups, in which the majority of the species possess an operculum. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" As in Scrupocellaria, the opening of the cell is sometimes protected by a pedunculate operculum. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 A small flat spinous point projects beyond the scales of the operculum, which has a very narrow membranous edging. Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. A few Euthyneura in which the shell is not much reduced retain an operculum in the adult state, e.g. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Geoffroy considers that the external opening of the ear corresponds to the external opening of the gill-chamber, which lies between the operculum and the pectoral girdle. Form and Function A Contribution to the History of Animal Morphology The former subdivision of the Bryales into Musci Cleistocarpi and Musci Stegocarpi according to the absence or presence of an operculum is thus clearly artificial. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Slender: sufficiently distinguished by the peculiar form of the operculum. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 A still more highly endowed relation spins a similar fabric, upon which are loosely agglutinated numbers of small dead shells, grit, and even opercula a quarter of an inch in diameter. My Tropic Isle Shell thin, more or less covered by the mantle; no operculum. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z You might suppose that in this case the trap-like operculum would afford an easy entrance to one familiar with its use; but, true to his secret system, the burglar broke in as before. The Atlantic Monthly, Volume 02, No. 11, September, 1858 It was easy to see that the stones are thin and porous opercula, which have formed part of small univalve shells. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The genus, therefore, may, like that, admit of being divided into sections, distinguished respectively by the presence or absence of a pedunculate operculum. a. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 Opacity is primarily manifested at the aperture of the infant mollusc where a seeming resemblance to an operculum forms, possibly for the protection of vital organs during nascency. My Tropic Isle Shell fusiform and solid, aperture elongated, columella folded; no operculum; eyes on sides of tentacles. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Some marine univalves can seal themselves inside with an operculum, which covers the open end of the shell like a trap door. Let's Collect Rocks and Shells These calcareous opercula effervesce with lemon juice, and put themselves in motion in proportion as the carbonic acid is disengaged. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Veins or channels in the oral operculum, branching so as to resemble the antlers of a stag. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 There is also another species of bream found in our river, without the red spot on the operculum, which, according to M. Agassiz, is undescribed. A Week on the Concord and Merrimack Rivers Foot very large; without operculum; shell with short spire and longitudinal ribs; siphon long. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z Save the univalve's operculum and slice it off the muscle that holds it. Let's Collect Rocks and Shells Some are of opinion that the two plates have been the gizzard of a cephalopod; others, that it may have formed a bivalve operculum of the same. The Student's Elements of Geology The very peculiar markings on the operculum at once distinguish it. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 The presence of an operculum seems to have been of importance, as out of twelve specimens of Cyclostoma elegans, which is thus furnished, eleven revived. The Origin of Species by means of Natural Selection, 6th Edition Fig. 45.—Actaeon. h, shell; b, oral hood; d, foot; f, operculum. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z I lifted the circular operculum from its place and laid it carefully on the bale. The First Men in the Moon The cavity of the tube by which the process arises, becomes, in the expanded portion, continuous with variously disposed grooves or channels, which terminate at the edges of the operculum. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 |
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