THE SHORE FISHES OF PERU 53 



d. Rudimentarj^ caudal virtually undeveloped, a mere cutaneous ridge; 

 first dorsal notably smaller than the second, base of first 3.3 in snout; 

 mouth rather narrow, its width 1.65 in snout; teeth with round 

 crowns and a low pointed cusp posteriorly; upperparts with few 



obscure dark spots asper, new species (p. 57) 



dd. Rudimentary caudal much better developed, a prominent cutaneous 



fold; first and second dorsal of about equal size, base of first 2.65 to 



2.95 in snout; mouth wider, 1.45 in snout. 



e. Interorbital rather narrow, about 2.25 times diameter of eye, 2.15 



in snout, and 9.0 in length anterior to vent; teeth with transversely 



oblong crowns, and a low transversely broadened cusp becoming 



pointed at tip; upperparts with numerous distinct black spots. 



maculatus, new species (p. 59) 



ee. Interorbital very broad, about 3.25 times diameter of eye, 1.8 in 



snout, and 7.5 in length anterior to vent; teeth with round crowns, 



and a prominent central cusp; upperparts with scattered but 



distinct black spots chilcae, new species (p. 61) 



PSAMMOBATIS AGUJA (Kendall and Radcliffe) 



Raja aguja Kendall and Radcliffe, 1912, p. 78, pi. 1, figs. 1, 2, Aguja Point, Peru 

 (original description, based on the type and a "cotype"; the cotype, however, 

 apparently is of a different species, and therefore that part of the description 

 pertaining to this specimen, and figure 2, which is based upon it, probably 

 do not apply). — Garman, 1913, p. 358 (description, based on the "cotype," 

 a specimen 286 mm. long, which apparently is not this species). — Beebe and 

 Tee- Van, 1941, p. 254, fig. 12 (range; field characters; size; references; 

 discussion, it being suggested that the type may not be Psammohatis) . 



Malacorhina scobina Tortonese (not of Philippi), 1939b, p. 214, fig. 5, Callao; 

 Peru (synonomy; description). 



Disk notably broader than long, with tip of snout scarcely pro- 

 jecting, somewhat convex opposite snout, slightly concave opposite 

 nuchal region, convex elsewhere; width of disk 1.4 in total length; 

 its greatest length 1.77; length anterior to axil of pectoral 2.05; length 

 anterior to vent 2.0; length posterior to vent 2.05; tail depressed 

 throughout, its depth 1.65 its width at axil of ventral, with a slight 

 lateral keel beginning near its base, developing into a cutaneous fold 

 posteriorly, not quite extending to tip of tail; snout rather long, 3.55 

 in length anterior to axil of pectoral, and 5.15 in width of disk, its pre- 

 oral length slightly exceeding its length to eye, 3.44 in length anterior 

 to axil of pectoral, 5.0 in width of disk; eye large, its longitudinal 

 diameter somewhat greater than width of spiracle, 4.05 in snout; 

 interorbital narrow, not especially concave, only 1.1 times diameter 

 of eye, 3.6 in snout, 13.0 in length anterior to vent; internarial space 

 considerably narrower than mouth, 2.1 in preoral length; mouth bent 

 forward slightly, its width 1.65 in preoral length, 8.35 in width of disk; 

 teeth in 28 transverse rows, with a round flattened crown, with slightly 

 raised margin, posteriorly with a low pointed cusp; prickles in a band 

 on lower surface of disk along anterolateral margin, a few scattered 

 ones similarly placed on upper surface, a few on interorbital region, 



(124204— 45 5 



