45. Gymnocenthus galeatus Bean (Fig. 5) 



Gymnocanthus galeatus Bean Proc USNM 4, 1881, p. 153 (Unalaska Id.) 

 Gymnocanthus detrisus Taranetz (non Gilbert & Burke) Trans. Far East Br. Acad 

 Sci SSSR. no. 1-3, p. 70 (in part, Olu tor sky Gulf, "possibly a complex") . 



Examples undoubtably of the type are known from the eastern part of Bering 

 sea (Unalaska, St. Paul Id., Acutan Bay, etc). As shown by Gilbert and Scofield, 

 the G. galeatus from the polar sea ^^ 



(Cape Sabine & Point Barrow) is a V''^''^^N^ 



doubtful record as the latter author ^ 



had only young examples . On asia- ' -^*^^i^iv''V 



tic coasts this species was first ^=?*=^=:> ;,.-■• ^y^^^'<:£- --^^^ 



found by A. Y . Taranetz in the ma- ~ TT^^^^fe--^^ 



terial of the GGI and TIRH expedi- 

 tions (DALNEVOSTOTCHNIK, 1932, 

 PALTUS, 1932). 



The 9 examples of G_ galeatus 

 from Koriak Land measure: D XI, 

 16-17, A 18-19, LI 45-48. 



As shown by A . Y . Taranetz 

 this form (as opposed to G. detri - 

 sus Gilbert & Burke) has the inter - 

 orbital thickly covered with bony 

 plates; thus the edges are coarse, 

 whereas in the other types the plates Fig. 5 . 

 never reach the edges. The inter - 

 orbital measures 6.6-9.6 (10.7% Fig. 6. 



head) and is narrow and concave . 

 Top of head flat, not noticeably 

 elevated as in G. detrisus. 



Gymnocanthus galeatus Bean near 

 Natalie Gulf 



Gymnocanthus detrisus Gilbert & 

 Burke. Avachin Gulf . 



46 . Gymnocanthus detrisus Gilbert & Burke 



Gymnocanthus galeatus Evermann & Goldsborough (not of Bean), Fishes of Alaska, 



p. 319 (in part, Iturup Is., Kuril) 

 Gymnocanthus detrisus Gilbert & Burke, Fish Bering Sea & Kamchatak, 1912, p. 



61 (west Kamchatka, 25 fath.). 



This species is known from the Northern Japan sea and Okhotsk sea on SE 

 Kamchatka (Avachin bay) . It is close to the Bering Sea form G. galeatus Bean, but 



28 



