72 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



vent; eye notably smaller than spiracle, 5.7 in snout; interorbital 

 space flat to slightly concave, 1.35 in snout, 5.7 in length anterior to 

 vent; space between spiracles notably narrower, 1.45 in snout, 6.15 in 

 length anterior to vent; mouth transverse, its width 1.6 in snout, 6.65 

 in length anterior to vent; teeth small, pointed, in a narrow band in 

 each jaw; ventral narrow, distally convex, its outer margin 4.3 in 

 length anterior to vent; clasper reaching about half its length beyond 

 adjacent part of ventral. 



Color of old preserved specimen brown above, "mingled olive green 

 and olive brown" in life, with pale spots about as large as pupil rather 

 widely scattered over the disk, each spot surrounded by a more or 

 less definite dark ring; disk also with light and dark markings, these 



/^ 



-X 



■ ■ ■■■•...■ y 



"■ .'.■■■./■ 



s,}^-^^-^^"^ 



Figure 16. — Pteroplatea afuerae, new species. From the type, 353 mm. long, Lobos de 

 Afuera Island, Peru (U.S.N.M. No. 77709). Insert, diagram of outline of snout and 

 position of mouth and nostrils. 



most conspicuous on anterior part of disk; pale underneath ;" posterior 

 border of disk above of a dark reddish color * * *"; lower border 

 of same color in life. Quotations are from Evermann and Radcliffe 

 (see reference above). 



The description is based on a male, having a length of 353 mm. and 

 a width of 500 mm. (U.S.N.M. No. 77709), secured at Lobos de Afuera 

 Island, Peru, by R. E. Coker. This is the specimen identified as P. 

 crebripunctata Peters by Evermann and Radcliffe (see reference 

 above). 



Upon comparing the Peruvian skate with two smaller specimens, 

 157 and 290 mm. wide, from Mazatldn, Mexico (U.S.N.M. Nos. 47497 

 and 28298), identified as P. crebripunctata (=P. marmorata) , it was 



