PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 105 



biilf larger ; caudal fin moderate ; tlie upper teeth are distinctly serrate 

 on both sides of the base. 



SPHYRNIDiE. 



4. Sphyrna tiburo L. Bonnet-head Shark. 



Common. 



PRISTIDiE. 



5. Pristis pectinatus Latham. Saw-fish. 



Rather common, the saws often brought in by the fishermen. 



TORPEDINIDiE. 



6. Narciiie umbrosa, sp. uov. 



Two young male specimens, 10 to 11 inches in length, taken. The 

 color is exactly alike in both, and is materially different from that given 

 in any of the descriptions of Narcine hrasiliensis or of the related variety 

 or speciesiVam»ecorrt//w«Garman ( = ? Toyyedo hancrof UGri^th). Light 

 brown ; tip of snout blackish; a large black triangular area before each 

 eye, covering most of the front of the disk ; space between eyes pale ; 

 space between spiracles mostly pale ; a round black blotch on median 

 line behind this; a round blotch behind and outward from each spira- 

 cle ; another near this on the edge of the disk ; another behind this on 

 the edge of the disk; a large transversely oblong blotch in line with 

 this on each side of the median line; posterior part of disk with a dark 

 blotch near the edge ; a large black blotch between angle of i)ectorals 

 and ventrals; ventrals each with two dusky blotches, the posterior one 

 on the claspers ; a dusky blotch on the back of the tail between them ; 

 each dorsal in a distinct black cross blotch, which extends up on the 

 tins ; a dark blotch on the tip of each dorsal and three on the caudal; 

 ill all about 30 distinct dusky spots and blotches above, all of them 

 larger than the eye* There are also some rows of dark dots, ai^parently 

 the mouths of pores, along each side of the tail above, near its base, 

 and along the sides of the disk. 



General form of the body more like that of N. timlei than that of K. 

 hrasiliensis; the disk very nearly circular, .very slightly broader than 

 long ; the snout broadly rounded, and not at all exserted ; the greatest 

 width of the disk at its middle or opposite the third gill-opening ; pec- 

 torals extending- backward to base of ventrals, but scarcely covering 

 them ; spiracles smaller than the eyes, and close to them, their poste- 

 rior edges roughened. Length of snout from eye, 4;^ in length of disk, 

 and double the interorbital width. Nasal valve with a rather distinct 

 rounded median lobe and obscure lateral lobes; edge of valve a little 

 denticulated. Width of mouth about 1^ in preoral portion of snout. 

 Teeth sharp. Tail about If length of disk. Second dorsal a little 

 higher and a little longer than first, the posterior margins of both sub- 

 truncate ; that of the caudal lunate. 



