62 



BULLETIN IS 9, UNITED STATES NATIONAL MUSEUM 



only partly separated from a well-developed rudimentary caudal by a 

 notch; ventral rather deeply notched, the outer lobe 3.8 in length 

 anterior to axil of pectoral, 5.15 in width of disk; claspers very long, 

 pointed, reaching opposite base of first dorsal, 3.3 in total length, 

 equipped with a large, flat, sharply pointed spine, bent outward 

 gently. 



General color gray, with ill-defined, dark gray blotches, and scattered 

 but distinct dark spots; dark blotches most definitely outlined on 

 margins of pectorals; one involving a considerable part of snout, with 

 a small pale area within at tip of snout; a pair near margin opposite 

 and posterior to spiracles ; and a pair of very large ones on inner parts 



Figure 12. — Psammohatis chilcae, new species. From the type, 345 mm. long, Chilca 

 Bay, Peru (U.S.N.M. No. 127785). Insert, ventral view of head. 



of pectoral opposite about middle of back ; back and tail with obscure 

 dark cross bands. 



The description is based on the type and only specimen at hand, a 

 male 345 mm. long (U.S.N.M. No. 127785). This specimen differs 

 from all others at hand in the small eye and correspondingly broader 

 interorbital space, wherein it seems to be in agreement with Norman's 

 account of P. lima. From the latter it differs, however, in the notably 

 fewer rows of teeth, the number given for lima being 40 to 44. It 

 seems to differ further from lima in the presence of a spine between the 

 dorsal fins, which is not mentioned in the description and is not shown 

 in Norman's figure. Prominent differences in color also seem to 



