| 单词 | ocellus |
| 例句 | Darwin was acutely aware of this and admired the modelling of the ocelli on the argus pheasant tail feathers as "more like a work of art than of nature". Survival of the Beautiful by David Rothenberg - review 2012-02-10T08:59:00Z The orange spots are ocelli, but toward the lower right they are starting to be clustered into structures that might be described as eyes. Fanworms, "Nature's Eye Factories", Stick Them Pretty Much Anywhere 2018-11-18T05:00:00Z They are thus able, like real ocelli, to track the sun. The buzz of something new 2015-03-26T04:00:00Z Bands of small blue ocelli are present on the rump feathers and near the tips of the uppertail coverts and tail feathers. The other turkey 2013-01-16T15:15:00.303Z Although hydras do not have eyes, other members of their family have simple eyes called ocelli. Blindsight: Animals that See Without Eyes [Slide Show] 2012-08-20T13:15:00.197Z Crown with a small ocellus? adjoining each eye. Zoological Illustrations, Volume III or Original Figures and Descriptions of New, Rare, or Interesting Animals 2012-04-20T02:00:06.887Z Insect compound eyes are composed of ocelli also. Fanworms, "Nature's Eye Factories", Stick Them Pretty Much Anywhere 2018-11-18T05:00:00Z Most insects possess a pair of compound eyes, and many have, in addition, three simple eyes or ocelli on the vertex. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z The full-grown worker is about half an inch long, and without ocelli even. West African studies 2012-02-15T03:00:28.537Z The stripes on the forelimbs were orange, and the ocelli on the carapace were red. Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala 2011-12-25T03:00:10.957Z The colours during life are remarkably changeable and iridescent; small dark spots are sometimes present on the body; the very high dorsal fin is beautifully marked with purplish bands and ocelli. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" 2011-11-28T03:00:19.517Z In each case, the insect consists of a worm-like body, having a small head provided with biting jaws and simple eyes or ocelli. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z But the invasion has been useless; the speculations have failed; and art and history mourn unavailingly the senseless and profitless destruction of this fairest gem of the lagoons: insularum ocellus. Critical Studies 2011-07-21T02:00:20.463Z The ocelli are so beautifully shaded that, as the Duke of Argyll remarks,143 they stand out like a ball lying loosely within a socket. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Insects, crustaceans, &c., have large masses of simple eyes or ocelli aggregated together to form compound eyes—the separate facets or lenses being optically distinct, and sometimes numbering many thousands. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z In a future chapter I shall have occasion to shew that the beautiful eye-like spots or ocelli, so common on the wings of many Lepidoptera, are eminently variable. The Descent of Man and Selection in Relation to Sex, Vol. I 2011-01-17T03:00:49.523Z Lateral eyes, when present, represented by separate ocelli. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" A much more probable explanation is that William is a corruption of the French name œillet, a word derived from the Latin ocellus, a little eye. Springtime and Other Essays But when I looked at the specimen in the British Museum, which is mounted with the wings expanded and trailing downwards, I was greatly disappointed, for the ocelli appeared flat or even concave. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Eyes are either preserved or lost; when preserved they are represented either by a single one-lensed ocellus or by an aggregation of such ocelli on each side of the head. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Markings of carapace in form of indistinct ocelli. A New Supspecies of Slider Turtle (Pseudemys scripta) from Coahuila, Mexico The ocelli appear to see as our eyes do. The Beauties of Nature and the Wonders of the World We Live In In its former state, the larva, subject to strange migrations, obviously needs the sense of sight and is provided with four ocelli. The Glow-Worm and Other Beetles In this attitude the ocelli over the whole body are exposed before the eyes of the admiring female in one grand bespangled ex91panse. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The antennae are many-jointed, and there is a single ocellus or a cluster of ocelli on each side of the head. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The antennæ are inserted high up on the head, next the ocelli, falling down over the clypeal region. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses The breast and under parts are rich deep brown profusely dotted with white ocelli. Birds of the Indian Hills Its head is a trifle longer than it is wide and is slightly dilated at the base; it is pale-red near the mouth and darker about the ocelli. The Glow-Worm and Other Beetles Lastly, the several ocelli are separated from each other by a pale surface bearing irregular black marks. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Vertex: the top of the head between the eyes, front and occiput: in bees, that part of the head adjacent to and occupied by the ocelli: in Notonectids, "the imaginary anterior margin of the notocephalon." Explanation of Terms Used in Entomology In most of the worms the eyes are simple ocelli—spots of pigment supplied with nerves. The Dawn of Reason or, Mental Traits in the Lower Animals Yellow, the legs with ferruginous stains; the antennæ black, with the scape yellow in front; the head with a large ovate black spot behind the ocelli. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology Its perilous peregrinations demand agility of movement, long-sighted eyes and masterly balancing-appliances; it has, in fact, a slender shape, ocelli, legs and special organs adapted to averting a fall. The Glow-Worm and Other Beetles The larger spots occupy exactly the same relative position on this feather as those occupied by the perfect ocelli on the longer wing-feathers. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Vertical triangle: in male Diptera, the small triangle upon which the ocelli are situated; limited behind by vertex, in front by eyes. Explanation of Terms Used in Entomology But in true insects, like the dragon-fly, or the butterfly, we meet with eyes of another kind, in addition to ocelli. Chatterbox, 1905. Black and shining; the vertex highly polished; the front from the posterior ocelli forwards closely punctured and opake; the mandibles, scape, and basal joint of the flagellum ferruginous. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology Behind the base of either antenn� are two ocelli, unequal in size and almost touching. The Glow-Worm and Other Beetles The tail and wing-feathers of this bird are ornamented with beautiful ocelli, like those on the peacock’s train. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Ocellar bristles: in Diptera, are situated close to the ocelli, usually directed forward: often absent. Explanation of Terms Used in Entomology Only ocelli, as these eyes are called, are found in the spider and his kind. Chatterbox, 1905. Ferruginous; the face testaceous-yellow, an elongate black spot on the vertex enclosing the ocelli and extending to the insertion of the antennæ; the latter black, with the scape ferruginous in front. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology The flower was at one time called ocellus, from the eye-shaped markings of its corolla. Herbal Simples Approved for Modern Uses of Cure The immensely developed secondary wing-feathers, which are confined to the male, are ornamented with a row of from twenty to twenty-three ocelli, each above an inch in diameter. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Ocellar triangle: a triangle, indicated by grooves or depressions, on which the ocelli are situated; Diptera. Explanation of Terms Used in Entomology These small eyes are simple, and are called ocelli. The Insect Folk Pale reddish-yellow; the antennæ slightly dusky above; a black transverse stripe on the vertex between the eyes, and another issuing from it in the middle and passing beyond the ocelli. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology Kemper and I were, of course, aware that in the insect world the ocelli served the same purpose that the degenerate pituitary body once served in the occiput of man. Police!!! Thus the formation of an ocellus in its simplest state appears to be a simple affair. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Ocelli occur in larvae and, singly or in small groups, in adults: the compound eyes are made up of numerous ocelli. Explanation of Terms Used in Entomology Many insects have ocelli, indeed, some of the grasshoppers have these extra eyes on top of their head. The Insect Folk The vertex smooth, and having three distinct ocelli; the head more produced behind the eyes than in Larrada. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology The eyes remain, it is true; but only the big ones: the little ocelli at the top of the head, found amongst so many of their allies, are quite wanting in all the aphides. Falling in Love With Other Essays on More Exact Branches of Science By what further steps the more complex ocelli, which 135are surrounded by many successive zones of colour, have been generated, I will not pretend to say. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Retinula -ae: the retina of a single ocellus: the nerve fibres or cells between pigment cells and retina of the compound eye. Explanation of Terms Used in Entomology You would not be apt to notice these little ocelli on the grasshopper's head, they are so small, and besides, some of the grasshoppers do not have them. The Insect Folk Deep blue-green, with tints of purple in certain lights, particularly on the head, the clypeus with a central longitudinal ridge, its anterior margin slightly emarginate; the flagellum rufo-piceous beneath, the ocelli white. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology The ocelli on the wing feathers were favourite objects of Darwin's, and sometimes formed the subject of the little lectures which on rare occasions he would give to a visitor interested in Natural History. Alfred Russel Wallace: Letters and Reminiscences, Vol. 1 The tail-feathers in both species of peacock are entirely destitute of ocelli, and this apparently is related to their being covered up and concealed by the long tail-coverts. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Front: the anterior portion of head between base of antennae and below ocelli: in Homoptera, the vertical median area of face. Explanation of Terms Used in Entomology Some species have ocelli, and some have not. The Insect Folk The ocelli were covered with black varnish, but neither this, nor cutting off the spines of the tortoise-shell larva to ascertain whether they might be sense-organs, produced any effect on the resulting colour. Darwinism (1889) In Wallace's book, the meaning of the ocelli comes in by the way, in the explanation of Plate IX., Alfred Russel Wallace: Letters and Reminiscences, Vol. 1 The indentation of the central disc and surrounding zones of the ocellus in both species of peacock, seems to me to speak plainly in favour of this view; and this structure is otherwise inexplicable. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Frontal lobes: in Psyllidae, two lobes or swellings more or less completely divided by a suture in which an ocellus is situated. Explanation of Terms Used in Entomology If you look full in the face of a cicada, you can see the three little round ocelli between the compound eyes. The Insect Folk After the first moult they become smaller, comparatively; but it is only after the second moult that the ocelli begin to appear, and these are not fully defined till after the third moult. Darwinism (1889) Each ocellus is furnished with its own lid, and the apt can, at will, close as many of the facets of his huge eyes as he chooses. Thuvia, Maid of Mars In order to discover how the ocelli have been developed, we cannot look to a long line of progenitors, nor to various closely-allied forms, for such do not now exist. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Frontal vesicle: in Odonata; that elevated area on the vertex upon which the ocelli are situated. Explanation of Terms Used in Entomology Indeed, it is difficult to explain what the ocelli are for. The Insect Folk They are brilliantly colored with a variety of tints, the back and breast are usually covered with white or buff ocelli, and the head is ornamented with two bright-colored, fleshy wattles. The Gutenberg Webster's Unabridged Dictionary Section T, U, V, and W Their colors are commonly brown and gray, often with ocelli on the wings. The Gutenberg Webster's Unabridged Dictionary Section S The extremities of the longer secondary feathers which bear the perfect ball-and-socket ocelli are peculiarly ornamented. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z In most invertebrates the eyes are immovable ocelli, or compound eyes made up of numerous ocelli. The Gutenberg Webster's Unabridged Dictionary Section D and E Others think the ocelli are only capable of distinguishing light from darkness. The Insect Folk This latter is provided above with two slender six-jointed antennæ, two very large faceted eyes at the side, and three ocelli forming a triangle. Scientific American Supplement, No. 385, May 19, 1883 Such villas were the fairest ornaments of Italy, "ocelli Italiae," as Cicero calls them, and their splendour may be inferred from the descriptions of Varro and Pliny. The History of Roman Literature From the earliest period to the death of Marcus Aurelius A, B, C, &c., dark stripes running obliquely down, each to an ocellus. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Among the medusae something similar exists in the disposition of the marginal appendages and the ocelli. Louis Agassiz: His Life and Correspondence In some way the insects are descended from the worms, and though they have got rid of many of their wormlike parts they still retain some of them, and probably among these are the ocelli. The Insect Folk A few moths are also provided with small simple eyes called ocelli; these are placed on top of the head and are so covered with down they cannot be distinguished save by experts. Moths of the Limberlost In Mr. Wallace's book the meaning of the ocelli comes in by the way, in the explanation of Plate IX., More Letters of Charles Darwin — Volume 2 In P. Napoleonis the ocelli are confined to the tail, and the back is of a rich metallic blue, in which respects this species approaches the Java peacock. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z In all the species the ocelli on the wings and tail are either circular or oval, and consist of a beautiful, iridescent, greenish-blue or greenish-purple disc, with a black border. The Descent of Man The broken state of the black ring on the upper side of the ocellus in fig. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z Now in this species the two central tail-feathers alone are ornamented, each with two brightly-coloured ocelli, the ocelli having completely disappeared from the inner sides of all the other tail-feathers. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The ocelli on the wing feathers were favourite objects of Mr. Darwin, and sometimes formed the subject of the little lectures which on rare occasions he would give to a visitor interested in Natural History. More Letters of Charles Darwin — Volume 2 This border in P. chinquis shades into brown which is edged with cream-colour, so that the ocellus is here surrounded with differently, though not brightly, shaded concentric zones. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The tail-feathers in both species of the peacock are entirely destitute of ocelli, and this apparently is related to their being covered up and concealed by the long tail-coverts. The Descent of Man Part of Secondary wing-feather of Argus pheasant, shewing two, a and b, perfect ocelli. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z It ought also to be observed that these sitters are among the brightest species in their respective families; for instance, Hygrogonus is bright green, with large black ocelli, encircled with the most brilliant red.” The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z See also an interesting paper by the Rev. H. H. Higgins, on the origin of the ocelli in the Lepidoptera in the ‘Quarterly Journal of Science,’ July, 1868, p. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The ocelli on the wings and tail of the several species of Polyplectron are either circular or oval, and consist of a beautiful, iridescent, greenish-blue or greenish-purple disc, with a black border. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z These confluent ocelli differ from the single ocelli of the peacock in having an indentation at both ends, instead of only at the lower or basal end. The Descent of Man This white shade itself is not as yet much concentrated; and beneath it the surface is brighter coloured than in a perfect ball-and-socket ocellus. The Descent of Man Even in the most perfect ocelli traces of the junction of three or four elongated black marks, by which the ring has been formed, may often be detected. The Descent of Man Thus the formation of an ocellus in its most elementary state appears to be a simple affair. The Descent of Man Thus the several species of Polyplectron manifestly make a graduated approach in the length of their tail-coverts, in the zoning of the ocelli, and in some other characters, to the peacock. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The indentation of the central disc and of the surrounding zones of the ocellus, in both species of peacock, speaks plainly in favour of this view, and is otherwise inexplicable. The Descent of Man By what further steps the more complex ocelli, which are surrounded by many successive zones of colour, have been generated, I will not pretend to say. The Descent of Man Part of secondary wing-feather of Argus pheasant, shewing two perfect ocelli, a and b. The Descent of Man In order to discover how the ocelli have been developed, we cannot look to a long line of progenitors, nor to many closely-allied forms, for such do not now exist. The Descent of Man These confluent ocelli differ from the single ocelli of the peacock in having an indentation at both ends, instead of at the lower or basal end alone. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z It should be particularly observed that each ocellus stands in obvious connection either with a dark stripe, or with a longitudinal row of dark spots, for both occur indifferently on the same feather. The Descent of Man This border in P. chinquis shades into brown, edged with cream colour, so that the ocellus is here surrounded with variously shaded, though not bright, concentric zones. The Descent of Man Thus the several species of Polyplectron manifestly make a graduated approach to the peacock in the length of their tail-coverts, in the zoning of the ocelli, and in some other characters. The Descent of Man Hence I was led carefully to examine the tail-feathers of the several species, in order to discover whether their ocelli shewed any tendency to disappear; and to my great satisfaction, this appeared to be so. The Descent of Man I will next describe the other extreme of the series, namely the first trace of an ocellus. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z The larger basal spots occupy exactly the same relative position on these feathers as do the perfect ocelli on the longer wing-feathers. The Descent of Man A, B, C, D, etc., are dark stripes running obliquely down, each to an ocellus. The Descent of Man Hence the ocelli on the several feathers, though occupying very different positions with respect to the light, all appear as if illuminated from above, just as an artist would have shaded them. The Descent of Man In cases like these, the development of a perfect ocellus does not require a long course of variation and selection. The Descent of Man These latter ornaments have been shewn to many persons, and all have admitted that they are extremely pretty, some thinking them even more beautiful than the ball-and-socket ocelli. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z It would, I think, perplex any one, who believes that the plumage of the Argus pheasant was created as we now see it, to account for the imperfect condition of the uppermost ocellus. The Descent of Man Between one of the elliptic ornaments and a perfect ball-and-socket ocellus, the gradation is so perfect that it is scarcely possible to decide when the latter term ought to be used. The Descent of Man The Saturniidae include some of the most beautiful of all moths, their wings being decorated, as in our British Emperor moth, with fine ocelli; and Mr. T.W. The Descent of Man I will next describe the other extreme of the series, namely, the first trace of an ocellus. The Descent of Man It would, I think, perplex any one, who believes that the plumage of the Argus pheasant was created as we now see it, to account for the imperfect condition of the uppermost ocelli. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z They explain also in the most interesting manner how certain characters have originated, such as the indented ocelli on the tail-feathers of the peacock, and the ball-and-socket ocelli on the wing-feathers of the Argus pheasant. The Descent of Man When I looked at the specimen in the British Museum, which is mounted with the wings expanded and trailing downwards, I was however greatly disappointed, for the ocelli appeared flat, or even concave. The Descent of Man In a future chapter I shall have occasion to shew that the beautiful eye-like spots, or ocelli, found on the wings of many Lepidoptera, are eminently variable. The Descent of Man The ocelli are absent in the females of certain insects, as in the Mutillidae; and here the females are likewise wingless. The Descent of Man Traces of the junction of all three elongated spots or marks, especially of the two upper ones, can still be observed in many of the most perfect ocelli. The Descent of Man and Selection in Relation to Sex Volume II (1st Edition) 2011-06-27T02:01:01.007Z These latter ornaments have been shewn to many persons, and all have admitted that they are beautiful, some thinking them even more so than the ball-and-socket ocelli. The Descent of Man In this attitude the ocelli over the whole body are exposed at the same time before the eyes of the admiring female in one grand bespangled expanse. The Descent of Man The immensely developed secondary wing-feathers are confined to the male; and each is ornamented with a row of from twenty to twenty-three ocelli, above an inch in diameter. The Descent of Man The tail and wing-feathers of this bird are ornamented with beautiful ocelli, like those on the peacock's train. The Descent of Man |
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