No. 2322. TREMATODE FAMILY HETEROPHYIDAE— RANSOM. 



569 



ventral sucker, forming a rather deep transversely elongated cavity, 

 into the right side of which the vagina opens. A lenticular-shaped 

 body about half the size of the ventral sucker in relation with the 

 terminal portion of the vas deferens, which empties into the left side 

 of the genital sinus, this bodj^ being protrusible through the genital 





33 



31 



Figs. 31-33. 31.— Ascocotyle coleostoma. Ventral view (through error the oral cecum is 

 shown on the ventral instead of the dorsal side of the prepharynx). x 128. after looss, 



1896. 32.— PYGLDIOPSIS GENATA. VENTRAL VIEW. X ABOUT 150. AFTER LOOSS, 1907. 33.— PYGIDIOP- 

 SIB GENATA. DORSAL VIEW. X ABOUT 150. AFTER LOOSS, 1907. [FOR EXPLANATION OF LETTEKINO 

 SEE FOOTNOTE, P. 532.) 



pore. Prostatic portion of vas deferens weakly developed. Seminal 

 vesicle S-shaped, the two posterior loops only ordinarily being visible 

 as a U-shaped structure in the median line near the dorsal surface of 

 the body behind the ventral sucker. Coils of uterus fill most of the 

 posterior portion of the body behind the level of the ventral sucker 



