110 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



aaa. Middle of first dorsal much nearer root of veutrals than pectorals; suont rather 

 short, its width a little greater than distance between angles of mouth. First 

 dorsal longer than high, its blunt tip when depressed not reaching tip of pos- 

 terior lobe, its margin deeply incised, its base 2^ times in the interval between 

 dorsals ; teeth rather sharp ; lower lobe of caudal blunt ; tail less than one- 

 fifth length of body, its terminal lobe more than one-third its length ; pectorals 

 rather obtuse, their free margin little concave, their tips reaching little past 

 front of dorsal ; inner lobe of ventrals somewhat produced ; embryo attached 

 to uterus by a placenta ; color rather dark ; axils of pectorals and ventrals 

 dusky Californicus.* 



DEmCRIPTIOIN OF A IVEW SHARK (CARC IIAKIAiii IiA.lIIEIiL.A) FROm 

 .SAIV DIFOO, CALIFORNIA. 



By DAVID S. JORDAI>f and CHARLES H. GILBERT. 



Allied to Carcharias lamia (Risso). 



Body comparatively robust, the back elevated, the greatest depth 

 half more than the height of the dorsal liii and equal to the distance 

 from the nostril to the gill-openings. 



Head broad and flat, the snout long, but wide and rounded. Length 

 of snout from mouth greater than the distance between outer angles of 

 nostrils, a little more than width of mouth. Nostrils considerably nearer 

 the eye than tip of snout, but nearer snout than angle of mouth. Eyes 

 moderate. 



Teeth about f ^, not very large, the upi)er rather narrowly triangular, 

 nearly erect, slightly concave on the outer margin, but not notched, 

 rather finely serrated everywhere. Lower teeth similar, but consider- 

 ably narrower, finely serrated. Middle teeth in both jaws smaller than 

 the others. 



A pair of jaws taken from a much larger specimen have, as usual, 

 the teeth considerably broader than in the young and more distinctly 

 serrate. They are quite similar to the teeth of C. lamia. 



First dorsal beginning at a distance four-fifths the length of its own 

 base behind the root of pectorals, and ending at a point somewhat more 

 than its own base before the ventrals, its height slightly more than the 

 distance from the snout to the posterior margin of the eye, slightly more 

 than its base, and considerably less than greatest height of body. Space 

 between dorsals equal to the distance from snout to first gill-opening, 

 2f times base of first dorsal, 7 times base of second. 



Second dorsal very small, not one-sixth the size of the first and con- 

 siderably smaller than the anal, which is deeply emarginate, the two 

 fins nearly opposite each other. Ventrals small, nearly midway be- 

 tween the two dorsals. Tail long, forming nearly two-sevenths of the 

 total length. Pectorals broad and long, not pointed, their tips reach- 



* Musiehts californiciis Gill, Proc. Ac. Nat. Sci. Phila. 1864, liS : = Mi^stelus hinnuliis 

 Jor. & Gilb. Proc. U. S. Nat. Mus. 1881, 31 (not of Blaiuville). Coast of Southern 

 California, San Francisco, Monterey, Santa Barbara, San Pedro, San Diego (Jor. «fe 

 Gilb). 



