TBEMATODES OF THE NORTHUMBERLAND COAST 



445 



EXPLANATION OF PLATE XL 



Note : —At the time when the plate was being lithographed it was 

 proposed to name the genus Strepsorchis, and this name appears on the 

 plate instead of Echinostefhilla. 



Fig. I. — Head and fore part of body of Echinostephilla virgula. 

 (For the sake of clearness the spines of the body are shown less 

 numerous than they really are.) 



Fig. 2. — Echinostephilla virgula — ventral view. 



Fig. 3. — Region of genital pore oi Echinostephilla virgula. 



V. S. ventral sucker 



V. SEM. vesicula seminalis 



0. s. 



oral sucker 



p. PH. 



prepharynx 



PH. 



pharynx 



E. 



excretory system 



GES 



oesophagus 



G. P. 



genital pore 



L 



intestine 



V. 



vagina 



VL 



vitellaria 



EG. 



eggs 



0. 



ovary 



T. 



testes 



C. 



cirrus 



C. S. 



cirrus sac 



