The natural history of fishes, amphibians, & reptiles, or monocardian animals . ncreases the difficulty of understanding them. f We have before expressed our opinion on the very artificial nature ofthe arrangement of the cartilaginous fishes by Miiller and Henle, as ex-hibited in their paper already quoted; nevertheless, we deem it advisable toinsert most of their subdivisions, that they may be hereafter comparedwith those of Rafinesque, and the priority of nomenclature to such as aredetained be equitably adjusted. 318 CLASSIFICATION OF FISHES^ ETC. anal; teeth long, pointed, with one lateral
The natural history of fishes, amphibians, & reptiles, or monocardian animals . ncreases the difficulty of understanding them. f We have before expressed our opinion on the very artificial nature ofthe arrangement of the cartilaginous fishes by Miiller and Henle, as ex-hibited in their paper already quoted; nevertheless, we deem it advisable toinsert most of their subdivisions, that they may be hereafter comparedwith those of Rafinesque, and the priority of nomenclature to such as aredetained be equitably adjusted. 318 CLASSIFICATION OF FISHES^ ETC. anal; teeth long, pointed, with one lateral denticle or two on each side. Alopecias ]M. and H. Head, dorsal, and anal fins^ andspiracles as m Lanina, but the branchial openings aresmall; upper lobe of the caudal extremely elongated;a dimple on the tail, but no lateral keel; teeth sharp,triangular, without serrature or protuberance, (l Sp.) 3. SuBFAii. wanting; head excessively dilated on eachside j eyes very remote, ZyGANA Antiq. {fig-97-) Head hammer-shaped ; theeyes placed at the two Z. laticeps Cantor.* (Vol. I. p. 134. fig. 11.) Platysquahis Sw. Head more or less heart-shaped; analfin placed opposite to the second tiburo Linn. Russ. pi. 12. fig. 2. 4. ScBFAM. CROSSORHIN^.Mouth terminal and almost vertical, surrounded withstrap-like cirri or lobes; eyes placed close to the crown;spiracles large. Crossorhixus M. and H. Dorsal fins two, placedclose to the caudal fin ; teeth acute. C. lobatus. (Vol. I. p. 143. fig. 15.) 5. ScBFAM. produced mto an osseous, flat, sword-shaped plate,armed with spines on the sides ; mouth beneath. * Ouarterlv Medical Journal of Calcutta, No. 3., July, 1837. RAlDiE. TBYGONINiE. 319 Pristis Latham, (fig. QS.) Teeth small^ rounded^ andextending over the tip.
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectreptiles
