364 PROCEEDINGS OF THE ACADEMY OF [1899, 



Four specimens. This species has been confused for a long time 

 with the common Paralichthys of Mazatlan, from which it is wholly 

 distinct. The Mexican species (P. sinalo(e Jordan and Abbott, in 

 Fishes of N. A., Addenda, 2872) has cycloid scales and fewer gill 

 rakers (14 or 13), while in adsper'sus the scales are strongly toothed, 

 and the gill rakers average 16 or 17. 



The four specimens at hand are sinistral, glossy black on the eyed 

 side, and show the spots and ocelli peculiar to the species. 



D. 68-74. A. 54-56. Length 250 mm. to 320 ram. 



Habitat. — Coast of Peru. 



102. Etropus ectenes Jordan. 



Etropnft ectenes Jordan, in Jordan and Goss, Review of the Flounders. 

 Rep. U. S. F. C, 1886, 277 (1889). 



Callao, Paraca bay, Peru. 



