Storer's Synopsis of I he Fishes of North .linaica. 



GENUS III. ALOriAS, Bonap. 



Head, dorsal and anal fins, and spiracles, as in the genus Lainna ; upper 

 lobe of the tail very long, with a depression at the base. Teeth triangular, 

 flat, with smooth cutting edges in both jaws, curving outwards on each side 

 from the centre. Branchial openings small, the last over the pectoral fins. 



1. Alopias vulpes, Gmel. 



Body fusiform. The upper lobe of the tail nearly as long as the body. Teeth trian- 

 gular, pointed, smooth upon their edges. A dark bluinh lead -color above ; beneath white. 

 with light bluish blotches upon the outer edges of the abdom in. 



D. (?)• P. (?)• V. (?). A. (?). C. (?). Length, 12 to 15 feet. 



Massachusetts, Storer. New York, Mitchill,, Dekay. 



is, Gmel., Lin., Syst, Nat., i I p. 1496. 

 Long-tailed Shark, I'esn v ■; , in. p. 110, pi. 14. 



. is vulpes, Fox-Shark, Shaw's Gl-u. Zoiil., v. p. 333. 

 1 ii v her, VTitchill, .Medical Repository, via. p. 77. 



Squa i i ing-lailed Shark, Mitchill, Trans. Lit. and Phil. Soc. of N. Y., 1. p. 4S2. 



Carcharias vulpes, Fox Shark or Thresher, Griffith's Cuv., x. p 

 Squatus S i sher, Jenyns's Brit. Vert., p. 498. 



Carcharias vulpes, Fox Shark or Thresher, Stoker's Report, p. 1S2. 



Alopias vulpes, Sea-Fox, Thre her, s a-Ape, Yarrell's Brit. Fishes (2d edit.), ii. p. 523, fig. 

 Carcharias vulpes, Thresher or Fox-Shark, Linslby's Cat, Fishes ol Connecticut. 



" " Thresher Shark, Dekay's Report, p. 31S, pi. 61, fig. 199. 



GENUS IV. MUSTELUS, Cuv. 



Teeth blunt, forming a closely compacted pavement in each jaw ; with tem- 

 poral orifices. First dorsal in advance of the ventrals. Lower lobe of the 

 caudal short. No spines. 



1. Mustelus canis, Mitchill. 



Body cylindrical, tapering, elongated. Back and sides of a uniform slate-color ; abdo- 

 men a dusky white. Body rough, when the finger is passed towards the head. Head flat 

 between the eyes. 



D. (?)■ P. ( ; )- V. (?). A. (?)- C. (.'). Length, 2 to 4 feet. 



Massachusetts, Storer. New York, Mitchill, Dekay. 



Called " Dog-fish Shark," by the fishermen of Massachusetts Bay. 



Squalus cani , Dog-fish, iIitciiill, Trans. Lit. and Phil. S'oc. of N. Y-, i. -l-G, pi. CI, li^ , a tO - 

 Mustelus canis, American Hound-fish, Dhkat's Report, p. 3.*>."<, pi. 64, fig, 209. 



GENUS V. SELACHUS, Cuv. 

 Two dorsal fins, the first placed but little behind the line of the pectorals, 



