338 



BIOLOGY OF THE SEAS OF THE U.S.S.R. 



50 40 30 20 '0 10 2J 3D 4J 50 30 70 



"1 / 





Fig. 166. Distribution of the worm Halicryptus spinulosis 

 (Ekman). 



4 8 12 16 20 24 28 32 36 



8 12 16 20 24 28 



Fig. 167. Distribution of the mollusc 

 Astarte borealis (Ekman and Johansen). 



