. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. HIGH SCHOOL ZOOLOGY. 75 "lot tho caso in Lepidostous however, for lioro all the parts of the latter are completely ossified, tho vertebra) bcung in fact more so than in other fishes, for their bodies are joined together by a ball and socket joint, (the socket behind—opisthocoelous) instead of having a cup at either end as in Amia and the Telcosts. The commonest species is L. osseus, but this is replaced in the Southern States by a larger form which reaches a length of eight or ten feet and is known
. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. HIGH SCHOOL ZOOLOGY. 75 "lot tho caso in Lepidostous however, for lioro all the parts of the latter are completely ossified, tho vertebra) bcung in fact more so than in other fishes, for their bodies are joined together by a ball and socket joint, (the socket behind—opisthocoelous) instead of having a cup at either end as in Amia and the Telcosts. The commonest species is L. osseus, but this is replaced in the Southern States by a larger form which reaches a length of eight or ten feet and is known as tho Alligator gar. 26. Superficially very unlike the garpikc, Amia nevertheless resembles it very closely in internal structure. Its snout is short and rounded, the lower jaws peculiar in being separated by a flat skin bone, the jugular plate, but otherwise the skeleton of the head is very similar to the garpike's. The doi"sal fin is long and low, whereas in the garpike, it is very far back and short and high. The caudal fin is not so unequally divided, and it is marked out in the male by an eyolike spot which stands out against the general dark green hue. There is only one species of Amia, A. calva; it is known in diflferent localities by different popular names, among which Mud-fish and Lake Dog-fish are the commonest. 27. In addition to the Ganoid genera already enumerated there are two other living forms confined to the rivers of Africa. These have scales like the garpike and gular plates like the Dog-fish, but their paired fins differ in structure, being composed of a disk-like part containing the skeleton surrounded by a fringe. The commonest species is the Polypterus bichir of the. Fig. 51. - Poli/pterun bichir. A- (After Claus.) Uppe.' Nile (Fig. 51) the generic name of which refers to the division of the dorsal fin into a series of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
