THE SHORE FISHES OF PERU 83 



Radcliffe, 1917, p. 19, Callao, Peru (not of Steindachner; description).— 

 Nichols and Murphy, 1922, p. 504, Pisco Bay, near Isla Blanca, Peru (not 

 of Steindachner). — Fowler, 1941a, p. 232 (not of Steindachner; references; 

 fig. 7). 

 Ethmidium maculatum Fowler, 1940b, p. 745, fig. 9, Peru (not of Cuvier and 

 Valenciennes); 1941a, p. 233 (references). 



Head 3.0 to 3.1; depth 2.8 to 3.1; D. 18 to 20; A. 15 to 18; P. 16 to 

 18; scales 52 to 60; vertebrae 48 (one specimen dissected). 



Body rather strongly compressed, its greatest thickness generally 

 about equal to depth over middle of anal; caudal peduncle about as 

 deep as long, 3.2 to 3.75 in head; head rather compressed, somewhat 

 convex above, its greatest thickness equal to eye and snout in large 

 examples, somewhat less in smaller ones; snout moderately blunt, 5.3 

 to 6.5 in head; eye 3.8 to 5.3, with adipose tissue somewhat developed 

 in adults; mouth rather large, oblique; lower jaw slightly included; 

 maxillary rather more than half width of eye, its lower margin for the 



Figure 17. — Ethmidium chilcae, new species. From the type, 270 mm. long, Chiica Bay 

 Peru (U.S.N.M. No. 127806).' 



most part nearly straight, broadly rounded posteriorly, extending 

 opposite vertical from posterior margin of eye in large examples, 

 scarcely to this point in small ones, 2.0 to 2.3 in head; mandible 1.75 

 to 1.85; gill rakers very numerous, equal to or somewhat longer than 

 eye, 130 on lower limb of first arch in a specimen 270 mm. long; scales 

 rather firm and adherent, strongly denticulate, generally with 2 defi- 

 nite vertical radii, often with 1 and sometimes 2 or 3 additional less 

 distinct vertical radii; ventral scutes rather strong, 19 to 21 in advance 

 of ventrals, and 16 to 18 behind them; 21 to 30 median scutes in ad- 

 vance of dorsal; dorsal more or less over middle of body, its origin 

 fully an eye's diameter nearer tip of snout than base of caudal, dis- 

 tance anterior to its origin 1.95 to 2.1 in length, the fin somewhat 

 elevated anteriorly, the last ray longer than the immediately preceding 

 ones, its margin concave, the longest rays 1.6 to 1.85 in head; anal much 

 lower, and smaller, last ray somewhat enlarged, its origin about 

 three-fourths as far from base of caudal as from base of ventral, base 



