Representatives of the genus Hippoglossoides previously have not been found 

 north of Bering Strait and possibly in previous years were absent. But in 1933 due 

 to a noticeable increase of the warm current through Bering Strait northward to the 

 Chukchi Sea, the eggs and even pelagic larvae of this flatfish may have been 

 carried there. Therefore the finding of H. robustus in the Chukchi Sea may be 

 merely passive (with the aid of the current), thus widening its distribution. 

 Future studies will show if this flatfish is adapted to the Chukchi Sea or 

 wliether the young will migrate back south . 



69. Lepidopsetta billneata (Ayres) 



This species is common in the northern Pacific Ocean Japan Sea to Monterey on 

 the American coast. Our material indicates that a twin lined flatfish is dis- 

 tributed sparcely in Bering Sea not in accumulated banks or numbers, and extending 

 north to the southern warmer portion of the Anadyr Gulf -St. Lawrence cold shallow 

 water. 1/ One young from Bering Island. Common at depths of 50 to 100 meters 

 on rocky gravel, rarer on sand (never on clay), avoiding negative temperatures, 

 range 0.4 to 2.2°. 



D 74-82 A 57-61 LI about 85 Gill rakers 4 plus 6 



70 . Limanda aspera (Pallas) 



Very common in the northern Pacific from Peter the Great Bay in the Japan Sea 

 to Vancouver Id. along the Pacific coast of America. Reaching Bering Strait to the 

 north but absent from the Chukchi Sea . We found it in Avacha Bay, Anadyr Gulf and 

 off the mouth of the Yukon and northward on the KRASNOARMEIETZ (1933) expedition 

 to south of Bering Strait (st. 74 (65), 64" 30' N, 167° 22' W, 33 meters, sand, 

 temp. 0.4°, Aug. 31, 1933, otter trawl, 2 examples, K. Panin.) 



In the above regions no banks were found, only single numbers of spiky limanda 

 were on sand or sandy-clay at depths of 20 to 130 meters, at temperatures of 

 0.2 to 1.9° (one 35 cm. example from the mouth of the Yukon was taken at a temp, of 

 9.5° at 20 meters) 



D 66-75 A 50-61 P 12 LI 80-89 Gill rakers 6 plus 8-9 (eyed side) 



u 



On the American coast of the Bering Sea Jordan & Evermann (1898, pt. 3, 

 p. 2643) record it to Bering Strait. 



45 



