62 . Aptocyclus ventricosus (Pallas) 



The common species of the littoral of Avacha Bay. North on the Asiatic coast 

 (according to A. Y. Taranetz) to Korf Gulf. In the Commander Ids. (common local 

 name "Myakonkaya") according to E. F. GuryanovoyaJ/ it appears on the littoral 

 in early March. It is seen in great numbers in April and serves as food for 

 birds, fox and fur seals. Until this period it is found in deeper waters and 

 only in spring it migrates into the littoral for spawmng. According to K. A. 

 Vinogradova (in Avacha Bay) spawmng is done on the tidal flats and after spawning 

 a great mortality occurs among females . The males "sit on the eggs" and remain 

 on the tidal flats during ebb tide, not regarding the preying birds . Spawmng, 

 growth of eggs and young occur under conditions which are easy to study and 

 make ecological -embryological research most desirable. 



Family Pleuronectidae 



63 . Atheresthes stomias (Jordan & Gilbert) 



Found commonly in Bering Sea (Priblov Ids . and further north) by the TIRH 

 trawler KRASNOARMEIETZ in 1932, at depths of 70 to 300 meters, at high bottom 

 temperatures (2 to 8°). The examples available (about 460 mm long) are poorly 

 preserved, salted material, making systematic description difficult. 



In the eastern part of Bering Sea it is valuable to the commercial trawl 

 industry.—/ West of St. Matthews Island it is replaced by the common asiatic 

 coast species A. evermanni Jordan & Stark s . 



64. Atheresthes evermanni Jordan & Starks 



The asiatic arrowtooth paltus is known from Japan and East Sakahlin. The 

 TIRH activities found it in the Okhotsk and Bering Seas . Its northern limit is 

 south Anadyr Gulf and the Anadyr-St. Lawrence cold shallow waters (the same limit 

 for the other three paltus'). On Commander Id (PALTUS, 1932) and more common 

 east of Matvi (St. Matthev^ Island on the American coasts it is replaced by A. stomias . 

 The DALNEVOSTOTCHNIK (1932) expedition found it in Avacha Bay (st. 2, 10 examples, 

 and 74 (60), 3 examples) and SE of Cape Navarin (st. 59 (51), 1 example). 



i 



1/ 



Priroda (Nature), 1935, no. 11, p. 72. 



2/ 



According to M. F. Vernidub, up to 300 per hour's trawling are found in Bering Sea. 



40 



