Slorer's Synopsis of the Fishes of North America. 251 



FAMILY XXXIII. SQUALIDJE. 



Body elongated, cylindrical. Tail thick and muscular. Eyes lateral. 

 Branchial openings on each side, never underneath. 



GENUS I. CARCIIARIAS, Cuv. 



One anal and two dorsal fins, the first dorsal placed over the space between 

 the pectoral and abdominal fins. Jaws and head depressed. Teeth flat, 

 pointed, and cutting ; serrated in the upper jaw, sometimes in both jaws. 

 No temporal orifices in adults, but rudiments may be observed in the foetus of 

 some of the species. 



1. Carcharias ceruleus, Mitchill. 



Small, body cylindrical. Teeth in several series, small, triangular, serrated. Pectorals 



broad; anal deeply notched. Slate-blue above ; beneath whitish. 



D. (■>.). P. (?). V. (?). A. ( : ). C. (?). Length, 2 to 6 feet. 



New York, Mitchill, Dekay. 



Carcharias ceruleus, Smalt Blue Shark, Mitcbill, Trans. Lit. and Phil. Soc. of X. Y., I. p. 487. 

 " " " Dekay's Keport, p. 349, pi. 61, fig. 200. 



2. Carcharias obscurus, Lesueur. 



Head flat and broad. Snout rounded. A single row of triangular, serrate teeth in the 

 upper jaw; two rows of similarly formed, but smaller, teeth in the lower jaw. Pectorals 

 long, narrow, and falciform ; ventrals subquadrangular, with no pointed process behind. 

 Dark brown above, rather lighter than the Lamna punctata ; beneath of a dirty white. 



D. (?). P. (?). V. (?).. A. (?)• C. (>)• Length, 9 to 10 feet. 



Massachusetts, Stoker. 



Carcharias obscurus. Dusky Shark, Lesiteur, Joiirn. Acad. Nat. Sc, I. p. 223, pi. 9. 

 << " " " Storer's Report, p. 184. 



(t it u << Stoker, Bost. Journ. Nat 111 !.i. pp. 533, 558. 



" " " Dbkay's Report, p. 350, pi. 61, fig 



3. Carcharias littoralis, Mitchill. 



Body short, thick, wider towards abdomen. Fins large, not prolonged backwards. The 



second dorsal before the anal. Snout acute. Reddish ash-gray above, white beneath. 



D. (?). P. (.')• V. (?). A. (.'). C.(?). Length, 3 to 8 feet. 



New York, Mitchill, Lesueur, Dekay. 



Squalus littoralis, Ground Shark, MiTcmix, Ama. Month. Mag., it. p. 328. 



" " Aah-colored Shark, I.E8UBUR, Journ. Acad Nat. Sc., I. p. 224. 



Carcharias littoralis, Ground Shark, Dekay's Report, p. 351. 



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