The natural history of fishes, amphibians, & reptiles, or monocardian animals . ; tail unequal, oblique; onlythree branchial apertures ; teeth small, acute.*E. aculeatus. Raf. Carat, p. 14. Scymnus Cuv. General structure of Centrina, but thedorsal fins are without spines (thus representingScyllium); body smooth; upper teeth straight andnarrow. S. borealis Scoreshy. Yarrell, ii. 403. Centrophorus Muller and Henle. Resembling Spinax,but the body covered with hard carinated scales orprickles; lower teeth indistinctly serrated; upperteeth equilateral, and not serrated. Sq. squamosus Lac. spinosus
The natural history of fishes, amphibians, & reptiles, or monocardian animals . ; tail unequal, oblique; onlythree branchial apertures ; teeth small, acute.*E. aculeatus. Raf. Carat, p. 14. Scymnus Cuv. General structure of Centrina, but thedorsal fins are without spines (thus representingScyllium); body smooth; upper teeth straight andnarrow. S. borealis Scoreshy. Yarrell, ii. 403. Centrophorus Muller and Henle. Resembling Spinax,but the body covered with hard carinated scales orprickles; lower teeth indistinctly serrated; upperteeth equilateral, and not serrated. Sq. squamosus Lac. spinosus Lac. Galeus Antiq. Raf. Dorsal fins two, destitute of spines;anal fin present; general form of Scymnus; bran-chial apertures five; tail and caudal fin oblique;divisions unequal; teeth serrated only on one vulgaris. Bloch. pi. 118. Yarrell, ii. 390. Scyllium Cuv. (fig. 96.) General characters of Selachus,with which it agrees, also, in the presence of very smallspiracles; but the caudal fin is elongated, oblique, * See Vol. I. p. 131. Sl6 CLASSIFICATION OF FISHES, irregularly lobed^ and - truncate at the tip; the teeth are tri- cuspidate, having three points; dorsal fins placed very near the caudal, the first being generally behind the ventrals ; head much depressed and rather broad. S. canicula. Bloch, pi. 114. (fig. 96.) Cestracion Cuv. Head not depressed, irregularlycylindrical; eyes almost vertical, placed very near thecrown, which is marked by two ridges; dorsal finstwo, each furnished with a spine placed in front;ventral fin placed between the two dorsals ; caudalmoderate, unequally forked; mouth terminal; ante-rior teeth small, pointed, and crowded; posteriorteeth obtuse, tessellated. C. PhilHpii. (Vol. I. p. 147. fig. 17.) MusTELUs Raf. General form of Galeus, but with all theteeth flat and tessellated, as in the Rays ; spiraclesvery large ; under lobe of the caudal very laevis Cuv. Yarrell, ii. p. 393. Spiraculated sharks, whose natural affinities
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectreptiles
