470 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 



of ocular side median, generally slightly shorter than that of blind 

 side, 2.4 to 2.7 in head; pectorals more or less pointed, usually with 

 an equal number of rays on each side, the one of ocular side the 

 longer, 1.3 to 1.5, and that of blind side 1.9 to 2.4 in head. 



Color grayish to brownish, with dark spots or rather large blotches, 

 variable among individuals, some specimens with pale specks and 

 spots; fins of about same color as body, also often spotted, the spots 

 on pectoral if present quite small. 



This species, previously known only from the type material from 

 Callao, and "Paraca Bay" (Pisco), Peru, is represented in the col- 

 lection furnished by the Mission by 12 specimens, 50 to 200 mm. 

 (41 to 163 mm. to base of caudal) long, taken in Sechura Bay, in Lobos 

 de Tierra Bay, Chimbote Bay, Samanco Bay, off Don Martin Island, 

 and in Chilca Bay. The specimens were all taken in shallow water, 

 mostly with seine, dredge, or otter trawl. 



This species is remarkable because of the position of the upper eye, 

 which is partly in the median dorsal ridge, and "looks upward," 

 appearing as if it had failed to complete the migration from the right 

 to the left side. 



Range. — Known only from the coast of Peru.^^ 



ETROPUS PERUVIANUS, new species 



Figure 88 



Head 4.0, 3.9, 3.4; depth 2.5, 2.5, 2.9; D. 82, 86; A. 64, 65; P. 10, 10; 

 scales 48, about 43, about 48. 



Body elongate, quite thin; profile evenly convex over head; head 

 moderate; caudal peduncle fairly slender, 2.4, 2.4, 2.8 in head; snout 

 in front of lower eye 6.4, 6.0; eyes equally advanced, the upper one 

 well across median ridge, 4.0, 3.75, 3.6 in head; interorbital a bony 

 ridge, narrower than pupil; mouth fairly small, oblique, terminal; 

 jaws curved; maxillary reaching under anterior margin of pupil, 4.0, 

 4.7, 4.5 in head; teeth small, in a single, close-set series in each jaw, 

 missing on less than half of upper jaw on ocular side; gill rakers very 

 small, nine, eight on lower and four, five on upper limb of first arch; 

 lateral line nearly straight, the larger paratype with a few branched 

 pores in temporal region, none evident in the other specimens; scales 

 rather large, partly lost, finely ctenoid on ocular side, cycloid on blind 

 side, no accessory scales evident, small scales extending on rays of 

 unpaired fins, and forward on head to interorbital; first ray of dorsal 

 over anterior part of eye; caudal somewhat pointed, the middle rays 

 longest, a little shorter than head ; first ray of anal under base of pec- 

 toral; ventral of ocular side median, apparently a little shorter than 



38 The range as given by Norman (see reference above) is "Pacific Coast of South America." However, 

 Ihave found no record of specimens taken anywhere except on the coast of Peru. 



