The natural history of fishes, amphibians, & reptiles, or monocardian animals . and masterly figures of Le Sueur of tenspecies of Catastomus may be consulted with advantage,both by ichthyologists and artists. The genus Leuciscusof Klein seems also to be one of the primary divisions ofthe carps : it is very numerous; but only one of itssub-genera has, as yet, been incorporated in our sys-tems. Dr. Hamiltons genus Chela belongs to it, andothers will be found in our Synopsis. The bleak, roach,and smelt, are all native examples; and they are at oncedistinguished from the two preceding genera, by t
The natural history of fishes, amphibians, & reptiles, or monocardian animals . and masterly figures of Le Sueur of tenspecies of Catastomus may be consulted with advantage,both by ichthyologists and artists. The genus Leuciscusof Klein seems also to be one of the primary divisions ofthe carps : it is very numerous; but only one of itssub-genera has, as yet, been incorporated in our sys-tems. Dr. Hamiltons genus Chela belongs to it, andothers will be found in our Synopsis. The bleak, roach,and smelt, are all native examples; and they are at oncedistinguished from the two preceding genera, by theirlips being destitute of barbels ; and their thin fins,which are without the anterior spinal ray. Those thatare found in India have such a strong resemblance tothe herrings, as observed by Dr. Hamilton, that theyare either related to them by affinity or by stronganalogy. We believe, however, that the relation isanalogical. As we proceed to the more aberrant carps,we find the genus Erythrinus of Gronovius (E. tceniatusSpix, fig. 47-), uniting the Cyprince with the Salmoni-. cUb, by their strong teeth and large mouth; while Gono-rynchus of the same author somewhat resembles Ery-thrinus, with the small toothless mouth of a carp. Lastly,the most aberrant type may possibly be that of Sudis,a small genus of freshwater fishes found in the rivers of 240 CLASSIFICATION OF FISHES. tropical latitudes. They have,, says Cuvier, Ci all thecharacters of Eryihrinus except that their dorsal andanal fins, both long and narrow, are placed close to thetail: he arranges them with the Clupeince; hut theyseem to us more naturally related to Cyprinus andSalmo. The last genus, Sudis, is remarkable for itslengthened cylindrical body, covered with large osseousscales, indicating its analogy to the cheloniform fishes,and to the flat-headed Siluridce : its mouth opens some-what vertically, as in Chironectes and Uranoscopus; andon these grounds we suspect it is the type of all thesefishes in the present
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