| 单词 | Petromyzon |
| 例句 | The sea lamprey, Petromyzon marinus, is most likely to be seen in British rivers at this time of year as the adults swim upstream to spawn. Return of the lamprey – ancient, ugly and swimming up British rivers 2016-05-15T04:00:00Z In Bdellostoma and in the larva of Petromyzon the gill-sacs open directly from the pharynx to the exterior, but in the adult lamprey and in Myxine the original relations are modified. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z This fact he connected with his observation that the fish Petromyzon, which possesses only two canals, moves in only two spatial dimensions. The Dancing Mouse A Study in Animal Behavior From Petromyzon upward that relationship is lost, the thyroid migrates more and more to the head region, to become the great link between sex and brain. The Glands Regulating Personality Thus the skull of Petromyzon answers to about fourteen segments of the body of Amphioxus, fused together and indistinguishable in even the earliest embryonic state of the higher vertebrata. Life and Letters of Thomas Henry Huxley — Volume 2 In Petromyzon the kidney has the ordinary compact form, and here also the Malpighian bodies are shut off from the splanchnocoele. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z It will be convenient, in describing the structural features of the group, to take as a basis for the description the marine lamprey, Petromyzon marinus. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z |
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