io7 



DESCRIPTION OF SPECIES 



of stigmata. At the anterior end of the branchial sac the dorsal lamina (d.la.) is narrow, and it increases 

 gradually in width towards the oesophageal mouth; the margin is plain and slightly rolled in. 



Gut. The oesophagus (oe.) is short, curved and rather wide. About thirteen longitudinal folds mark 

 the walls of the large ovoid stomach (st.). A very small straight pyloric caecum is hidden in the bend 



NUMBER OF 

 SPECIMENS 



10 _ 



MARCH ■ 



10 _ 



JAN 

 &. FEB 



-i 1 1 r 



< 



JAN 

 &. FEB 



10 _ 



DEC - 



~i 1 P 



4 5 6 



DIAMETER CM 



I 



1 



8 OVER 8 



i 



X 



Text-fig. 39. Cnemidocarpa verrucosa (Lesson): Size-distribution of specimens collected from different 



areas and in different months. 



14-2 



