1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 39 



NOTES AND DESCRIPTIONS TAKEN FROM SELACHIANS IN THE 

 U. S. NATIONAL MUSEUM 



By ». OARITIAIV. 



Myliobatis Goodei, ep. n. 



Disk about two-thirds as long as broad ; lateral angles acute, bluntly 

 rounded at the apices ; posterior angles of pectorals nearly rigbt. Snout 

 very broad, short, with a slight prominence in front. The fin, or flange, 

 beneath the eye at the side of the head is very wide, much wider than 

 in either M. freminvillei or M. californicus. Eyes very small, without a 

 prominence above in either male or female (immature specimens). Tail 

 less than twice and more than one and two-thirds times the length of 

 the disk. Dorsal fin smaller than that of freminvillei. Teeth in seven 

 series, much shorter and narrower than those of freminvillei, third row 

 about twice and middle row about four times as wide as long. Body 

 smooth. Entire length 29, snout to end of ventrals 11.5, vent to end of 

 tail 18.5, and width of disk 17.5 inches. 



Obvaceous, darker on the center; white below. The Museum of 

 Comparative Zoology has a large specimen which agrees well with this 

 de^ription. 



Compared with M. freminvillei, this species has very small eyes; the 

 pectoral below the orbit is wider than the eyeball, and the fin in front 

 of the skull is but little wider than at its sides. In freminvillei the eye- 

 ball is twice as wide as the fin beneath it, and the fin in front of the 

 skull is much wider than below the eye. Comparing specimens of about 

 the same size, of both sexes, oH freminvillei, californicus, and goodei, the 

 latter is readily distinguished from the former two by the broad flange 

 at the side of the head, the small eyes, the small teeth, and the broader 

 lateral angles of the i)ectorals. 



Ko. 9524 $ , 9529 9 . Central America. 



Named for Professor G. Brown Goode. 



Myliobatis freminvillei, Les. , 



Eyes about twice as large as those of M. goodei of the same size. The 

 expansion of the pectoral below the eye is very narrow, a mere ridge, 

 not half as wide as the same portion in Goode's ray. The pectoral near 

 the acute outer angles is much narrower than in that species. The teeth 

 are longer, and the median row is as wide as four of the next laterals. 

 In M. goodei the teeth are much shorter and the median row is only 

 about twice as wide as the next laterals, which in turn are about twice 

 the width of the outer rows. 



.No. 14858, Noank, Conn. Total length 25.6, snout to ventrals 8.1, 

 and width 14 inches. 



No. 19482, east shore of Virginia. Entire length 25, snout to ventrals 

 8, and width 14.2 inches. 



