The natural history of fishes, amphibians, & reptiles, or monocardian animals . * Amer. Trans, vol. i. pi. SO. 176 CLASSIFICATION OF FISHES. is absent in that described by Dr. Russell. The twoprocesses just mentioned conduct us at once to thegenus Ceratoptera M. and H., where these appendagesassume the form and office of lobed fins, as representedby the same artist {fig. 20.), the head is completely. obtuse in front, without any of the lobed appearanceseen in the last genus; while the mouth is at the ter-mination of the muzzle. On this latter account, theseremarkable fishes have been justly se
The natural history of fishes, amphibians, & reptiles, or monocardian animals . * Amer. Trans, vol. i. pi. SO. 176 CLASSIFICATION OF FISHES. is absent in that described by Dr. Russell. The twoprocesses just mentioned conduct us at once to thegenus Ceratoptera M. and H., where these appendagesassume the form and office of lobed fins, as representedby the same artist {fig. 20.), the head is completely. obtuse in front, without any of the lobed appearanceseen in the last genus; while the mouth is at the ter-mination of the muzzle. On this latter account, theseremarkable fishes have been justly separated from thetrue Pterocephali (or the Cephaloptera of Dumeril),where the mouth is on the under side of the head, as inall the other genera. We place JEtobates M. and H. asthe last genus, with some hesitation, suspecting that itreally possesses this rank in the present division ; forit has every one of the characters of Myliobates, super-added to a caudal sting. But its most remarkable pecu-liarity is the circumstance of the jaws being dissimilar: the lower one, as Dr. Russell observes on a specieshe has described, being arched, narrow, and projec-ing beyond the wider immovable upper jaw: the edgesof both are smooth and without teeth. * MM. Muller * Coromandel Fishes, vol. i. p. 5. RAID^. TORPEDO RAYS. 177 and Henle, however, whose method is chiefly foundedon these organs, gives the generi
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