j NO. 1324. ELASMOBRANCHIATE FISHES— JORDAN' AND FOWLER. 597 



mouth at cornors ^i^i; internasal space 3f; pectoral 1^; internasal space 



If in interorl)ital space. 



Body very elongate and tail greatly compressed, roughen(>d, and 



tapering to a point. Head rather small, oblong, greatly depressed, 



broad, and its greatest depth two-thirds its width; snout depressed 



broadly rounded, and projecting but little bej'ond mandible; eye small, 



its posterior margin about first two-fifteenths of length of head ; nostrils 



large, lateral, on sides of snout and a little low in position; mouth 



J very large, more than half the head; teeth tricuspid, spaces bc^twcen 



each cusp with a small denticle at base, similar in ])()th jaws, and in 



, 13-0-13 ,, . . ,,. 



formula wzri^ll' ^®^^ separated, m oblique rows, with not more 



} than 6 teeth in each row; tongue small, slightly elongate, point rounded, 

 and a little free in front; inside of mouth roughened, especiallv the 

 tongue. Gill-openings ver}^ large, first the largest, the others pro- 

 I gressively smaller; inner edges of branchial arches roughened; gill- 

 ifilaments flattened, adnate to inter])ranchial septa except at tip; pharynx 

 •long and broad; gill-membrane joined to isthmus medially by a thick 

 membrane. 



Scales very small and sharp, a little enlarged along lateral line, most 

 of edges of fins, and jaws, becoming especially large at angle of the 

 latter. 



Dorsal small, its origin about over that of anal; anal about twice as 

 large as dorsal; pectoral small, ))road, with a veiy l)lunt angle; ven- 

 trals large, broad, and rounded; caudal with broad lower lobe, tapering 

 to an elongate and sharp point, upper rays very short and uniform. 



Color in spirits uniform brown. 



Length 39i inches (99 cm. 6 mm.). 



This description from a Misaki specimen. 



Kuro Shiwo, off Izu, Sagami, and Awa, on the oast coast of Japan; 

 our three specimens from off Misaki, in Sagami. It has also been 

 taken off' Madeira and off Norway in deep water, and it is probably 

 widely distributed. 



Our largest example measures 59i inches (148 cm. mm.). 



{anguineus^ from an</vix^ the slow worm, the word allied toAfu/ui/la — 

 iyxef^vs, eel.) 



Order II. ASTEROSPONDYLI. 



TYPICAL SHARKS. 



The essential character of this ordei- is in the structure of the verte- 

 bra. The calcareous lamelhe within each vertelu-a radiate from the 

 central ring. The group contains the great body of living sharks, 

 including all of those with 5 gill openings, 2 dorsals, and an anal fin. 



{(XGT?'/p^ star; dTtoydvXos^ vertebra.) 



