Teeth on jaws small, no larger teeth noticeable . A tubercle on anterior 

 part of lower jaw protrudes noticeably. Premaxillaries are very curved, thicker 

 in front . Preorbital distance very narrow, particularly in young, forming a sharp 

 ridge along which is a single row of scales (in young the ridge is naked or with 

 single scales). 



Scales on blind side cycloid; on eyed side usually cycloid The head and 

 along the dorsal fm are covered with ctenoid scales . Lateral line slightly 

 curved, not forming an arch . Color uniform brown without spots . Measurements 

 of four examples follow: adult (375 mm.) and three young (136-174 mm). 



Measurements of Hippoglossoides elassodon from Bering Island 



Total length in mm. 375 136-174 (3 examples) 



28.6-30.5 

 35.7-39.4 



29.7-32.6 

 12.8-16.3 



37.5-46.5 



Greatest number of gill rakers on first arch & etc . narrow and slightly 

 scaled interorbital etc . show the relationship to the typical H . elassodon 

 which is common on the American coasts from Bristol Bay to Puget Sound. Our 

 examples differ in a larger number of gill rakers x plus 16-19 (in Jordan & 

 Evermann, 1898, p. 2615: 14-16), however Hubbs (1915, p. 463) lists the gill 

 rakers as 3 or 4 plus 16-19 in four examples from Puget Sound and Kamchatka. 



68. Hippoglossoides robustus Gill & Townsend 



This species was described on the basis of one example from the SE Bering 

 Sea (56° 14' N, 164° 8' W, 49 fathoms). One was described later from Kamchatka 

 as H. hamiltoni Jordan & Gilbert is placed in the synonymy of H. robustus Gill 

 and Townsend by many authors (P. Schmidt, 1915, Soldatov & Lindberg, 1930, Norman, 

 1934). In our collections are specimens from the northern Bering Sea and Chukchi 

 Sea where heretofore the genus Hippoglossoides was unknown. Our examplesi.' are 

 from Koriak land at Cape Navarin and the Anadyr cold spot (DALNEVOSTOTCHNIK, 



i/ 



A large number of flounders belonging to the genus Hippoglossoides were caught 



43 



