. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 332 mouthed Dog-fish. Light-brown, with ocellated spots. All the three are peculiarly destructive to the more valuable fishes. Some foreign ones have a slight difference of character. The Sharks properly so called include all species with a produced snout, no nasal grooves, and with a caudal lohe more or less forked. They form the genus Carcharias—a. numerous and notorious tribe, with trenchant-pointed teeth, usually serrated in the margins;
. The animal kingdom, arranged after its organization, forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 332 mouthed Dog-fish. Light-brown, with ocellated spots. All the three are peculiarly destructive to the more valuable fishes. Some foreign ones have a slight difference of character. The Sharks properly so called include all species with a produced snout, no nasal grooves, and with a caudal lohe more or less forked. They form the genus Carcharias—a. numerous and notorious tribe, with trenchant-pointed teeth, usually serrated in the margins; the first dorsal before the ventrals; the second nearly opposite the anals. They have no spiracles; the nostrils are in the middle of the snout, and the last gill-opening extends over the pectorals. C. vulgaris, the White Shark, is some- times twenty feet long, with isosceles-triangular teeth, ragged at the sides, and the lower ones narrow points placed on w ider bases ; these teeth in the mouth of such a fish forming weapons dreaded by all mariners. Found in most seas. [Its appear- ance on the British shores has been mentioned, but it wants authentication.] C. vulpes, the Fox- shark, or Thresher.—Triangular teeth in both jaws; upper lobe of the tail as long as the whole body ; second dorsal and anal very small. C. glau- cus, the Blue Shark, with curved-sided teeth above, inclining outwards, and straighter ones be- The White Shark. ^ . M ^^ on the ^^ Lamna, the Porbeagle, differs from a true Shark in the pyramidal snout, and the gill openings before the pec- torals. L. cornubica occasionally appears on the British coast, and its size has caused it to be mis- taken for the White Shark. L. monennis resembles the last, but has the snout shorter. Galeus.—Shaped like the Sharks, but with spira- cles and an anal. G. vulgaris, the Tope, is found on the British shores. Mustelus, resembles the former in shape, but has the teeth like a close pavement. Milavis, the Smoot
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectzoology, bookyear1854
