SECT. 4] 



BIOLOGICAL SrECIES, WATER-MASSES AND CURRENTS 



387 



Fig. 1. Euphausiid species inhabiting the subarctic water-mass, (a) Thysanoessa longipes 

 and (b) Euphausia pacifica. (Based mainly on sampling by the Scripps Institution and 

 the California Cooperative Oceanic Fisheries Investigations between the surface and 

 270-300 m.) 



