THE SHORE FISHES OF PERU 469 



Genus ETROPUS Jordan and Gilbert, 1882 



Very close to Citharichthys, differing in having a smaller mouth, 

 the maxillary failing to reach far beyond anterior margin of eye; 

 teeth less developed or wanting posteriorly in jaws of ocular side; 

 eyes always separated by a bony ridge; gill rakers few, short or of 

 moderate length. 



KEY TO THE SPECIES 



a. Eye partly in median dorsal ridge; dorsal with 89 to 96 rays; anal with 68 

 to 78; scales 54 to 59; none of the rays of pectoral on ocular side pro- 

 longed ectenes (p. 469) 



aa. Eye distinctly on left side of median dorsal ridge; dorsal with 82 to 86 rays; 

 anal with 63 to 65; scales 41 to 47; third ray of pectoral on ocular side 

 rather notably prolonged peruvianus, new species (p. 470) 



ETROPUS ECTENES Jordan 



Lenguado 



Etropus ectenes Jordan, in Jordan and Goss, 1889, p. 277, Callao, and "Paraca 

 Bay" (Pisco), Peru (original description, principally in key on same page). — 

 Norman, 1934, p. 155, fig. 107, "Paraca Bay," Peru (reference; descrip- 

 tion; range). 



Head 4.1 to 4.8; depth 2.1 to 2.6; D. 89 to 96; A. 68 to 78; P. 10 to 

 12; scales 55 to 57. 



Body oblong, quite thin; profile somewhat concave over head; 

 head small; caudal peduncle very short, deep, 1.7 to 2.25 in head; 

 snout in front of lower eye 7.5 to 8.6; eyes equally advanced or the 

 lower somewhat in advance of upper, the upper one partly in median 

 ridge, directed upward rather than laterally, 4.5 to 5.1 in head; inter- 

 orbital with sharp bony ridge over lower eye, very narrow in small 

 specimens, proportionately broader and slightly concave in large 

 ones; mouth small, oblique, terminal; jaws not noticeably curved; 

 maxillary reaching under anterior margm of pupil, 4.4 to 5.1 in head; 

 teeth small, slightly compressed at least in large specimens, in a single 

 close-set series in each jaw, missing on posterior half or so of both 

 jaws on ocular side; gill rakers short, moderately slender, scarcely 

 longer than pupil, eight or nine on lower and four to seven on upper 

 limb of first arch; lateral line nearly straight, some specimens with a 

 distinct supratemporal branch; scales moderately large, becoming 

 smaller on anterior part of body and on head, finely ctenoid on ocular 

 side, cycloid on blind side, accessory scales evident only along lateral 

 line, small scales extending on rays of unpaired fins, and forward on 

 interorbital ; first ray of dorsal on blind side, over or a little in advance 

 of middle of upper eye; caudal rounded to slightly angulate, middle 

 rays longest, equal to or a little shorter than head; first ray of anal 

 generally less than an eye's diameter behind base of pectoral; ventral 



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