/ 



V" 



li il 





^ 



9^ 



yy. n 7 . 



Dl 1.. I-.S.K. 



1. Common PvSLWn (Lcanett:*- serratus). 



2. Common Shrimp (Crangon vulgaris). 



Natural size. (p. 317). 



^ 335- 



