. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. by the authorities vhich the teeth of. ' IP .^,.—. Wr? iiiillfhif. Eft, of North iui adult crawling hatracliian with perpetual gills, but that it is in its preliminary or tad- pole stage of existence. ]\ir. Baird makes the following sensible remarks on this siibject:— " It so much resembles the larva of Amhjistoma punctata, in both external form and internal structure, that I cannot but believe it to be tlie larva of some gigantic spe
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. by the authorities vhich the teeth of. ' IP .^,.—. Wr? iiiillfhif. Eft, of North iui adult crawling hatracliian with perpetual gills, but that it is in its preliminary or tad- pole stage of existence. ]\ir. Baird makes the following sensible remarks on this siibject:— " It so much resembles the larva of Amhjistoma punctata, in both external form and internal structure, that I cannot but believe it to be tlie larva of some gigantic species of this genus. It differs from all other perennibranchiates in possessing the larval character of the gular or opercidar flap, this unattached to tlie adjacent integuments, and free to the extremity of the chin. The non-discovery of the adult is no argument againct its existence. I had caught hundreds of the very remarkable larva of Pseudotritoyi sahnoneus near Carlisle before I found an adult. Until then I knew nowhere to refer the animal, supposing this species to exist no nearer than the mountains of New York and Vermont. As may be seen from the illustration, the gills or braucliiii! are quite as large in pro- portion as those of the newt in its larval state. They are three in number on each side, and furnished witii fringes. The Axoldtl iidiabits Mexico, wliere it is tolerably plentiful, and in some places is found in su('h numbers that it is sold in the markets for the table. It frequents the lake surrounding the city of jMexico, and, according to Humboldt, is also found in the cold of certain mountain lakes at a c()usiderai)le elevation above the sea. The colour of this remarkable creature is rather dark greyish brown, covered thickly with black .spots. The length varies from eight to ten inches. Another .jiuall order now comes before us, containing a few species, and only two very small families. In all these creatures the Itoily is long and liza
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
