U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 



i^iu^smAi^ 



1-7. Podocotyle atomon (Rudolph!) : 1, From Hemitripterus americanus, ventral view; 2, 

 median region of another specimen from same host; 3, from Pseudopleuronectes 

 americanus, ventral view; 4-7, ovary and testes of four specimens from same host. 

 8 -12. Podocotyle olssoni Odhner: 8, From Morone aynericana; 9-11, ovary and testes from 

 three specimens from same host; 12, ovary and first testis of specimen from Perca 

 flavescens. 



