THE SHORE FISHES OF PERU 55 



PSAMMOBATIS BREVICAUDATUS Cope 



Psammobatis brevicaudatus Cope, 1877, p. 32, Pacasmajo Bay, Peru (original 

 description). — Fowler, 1910, p. 471, fig. 2 (description, based on the type). — 

 Garman, 1913, p. 371 (description, based on the type). 



tMalacorhina brevicaudata Tortonese, 1939a, p. 48, Santa Elena Bay, Ecuador 

 (brief description, based on a female 383 mm. long). 



Disk much broader than long, subrhombic, the lateral margms 

 broadly rounded, its width 1.15 in total length; length anterior to vent 

 1.6; length posterior to vent 2.7; tail with broad lateral fold; snout 

 with a small tubercle below at median point, its preoral length 7.1 

 in width of disk; interorbital little concave, wide, exceeding combined 

 length of eye and spiracle, 6.65 in length anterior to vent; internarial 

 space comparatively great, distance between outer rim of nostrils 

 being equal to the distance of each from tip of snout, and half as far 

 from margin of disk; spinules on upper surface of head, a broad band 

 on both surfaces of anterior part of disk; two spines on orbital ridge 

 in front of eye, and seven posterior to eye; a row of a few spines 

 between orbit and lateral free border; six to eight on median line of 

 middle portion of back; a series on median line of tail; and a double 

 row parallel to border of pectoral fin; two dorsal fins; caudal fin rudi- 

 mentary; ventral not deeply notched; claspers four-fifths length of tail. 



Upper surface lead color, with indistinct darker shades; middle of 

 anterior portion of snout pale, with a dark spot behind it. 



The foregoing account is based on Cope's description, and list of 

 measurements of the type, modified and rearranged to conform as far 

 as possible with the other descriptions of the genus presented. This 

 species is known only from the type, a male 307 mm. long, and a 

 specimen recorded by Tortonese (1939a, p. 48) from Santa Elena Bay, 

 Ecuador, which may or may not be this species. P. brevicaudatus 

 differs from all the other species described herein in the very broad 

 disk, short tail, and in the absence of a spine between the dorsal fins 

 (or such a spine at least is not mentioned in the description, or shown 

 by Fowler in his figure based on the type (see reference above) . 



Range. — Known from Pacasmayo Bay, Peru; recorded also from 

 Santa Elena Bay, Ecuador. 



PSAMMOBATIS CAUDISPINA, new species 



Platillo; Raya 

 Figure 9 



Raja steindachneri Evermann and Radcliffe, 1917, p. 14, Mollendo and Chim- 

 bote. Peru (references; description; discussion. Apparently not of Delfin). 



Psammobatis lima Norman, 1937, p. 34 (synonymy; description; range. In part 

 probably not this species). — Fowler, 1941a, p. 226, fig. 4 (references; listed 

 from Mollendo and Chimbote, Peru, presumably after Evermann and Rad- 

 cliffe, which is not P. lima) . 



Disk much broader than long, with tip of snout scarcely projecting, 

 gently convex opposite snout, slightly concave opposite spiracles, 



