18 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



of the mouth, each being provided with a tree cylindrical cirrus; an 

 upper and lower lip, the latter not extending across the symphysis; 

 fourth and tifth gill-openings close together; eyes very small. The 

 backward position of the first dorsal distinguishes this family from all 

 others in our waters. (Jenera two; species about four; large sharks of 

 the warm seas. ( X<-i/llii<I<r pt. (liinther, viii, 4(>7-40!>.) 



'IVi-tli in l>otli .jinvs in many series, each with a strong median cusp, anil one or 

 smaller r iisps on car] i siilc ................................ GlNGLYMQBTOMA, 1 < 



13.-INGLYIttOSTOITIA Miiller & Honle, is;<7. 

 (Miillcr A Henle, XVic^nianii's Ari-h. 1^:57, p. : type Stjiuilii* cirrntitx (inirlin.) 



The characters of this genus are those of the family above given, \vilh 

 tin- addition of the following, which distinguish Qinglymostoma from 

 \rhriun: teeth of both jaws in many scries, each with a strong median 

 cusp, and one or two smaller cusps on each side. (/'^/O/jtwc, a hinge or 

 hinge-like joint ; :, mouth.) 



18. G. o-irratuiH (duel, i M. & II. yurse Shark. 



Uniform brownish; young specimens with small, scattered, round 

 black spots; nasal cirrus reaching the lower lip; angles of the fins 

 obtusely rounded; caudal fin forming nearly one-third of the total 

 length. L. <! to 10 feet, ((.liiiitlu-r.) 



A large shark of the warmer parts of the Atlantic, abundant in the 

 (lull of .Mexico and the AVest Indies, and occasionally taken on our 

 South Atlantic coast. 

 (Sqiialim firm tun dnelin's Linna-ns. i, 1 10J ; Miillor & Henle,23; 6ttnther, viii, 406.) 



SUPER-FAMILY GALEORHINOIDEA. 



(The 



FAMILY VI I. 



Sharks \\ uh t \\ o dorsals and an anal tin; no spines; pectorals mod- 

 erate; caudal tin not greatly elongated, not lunate, moderately bent 

 upward.x. notched toward its end, and with the basal much less devel- 

 oped than the upper; caudal peduncle not keeled: posterior gill-opening 

 above the base <>| the peetoral tin : eyes with nictitating membranes; 

 head not hammer-shaped, the snout being longitudinally produced as 

 usual among sharks. A large family of twenty or more genera and about 



