PARASITES OF THE RUMEN. 



Amphistoma oonioum, Zeder. 



Plate XVII, Figs. 7 to 10. 



Body of a rose tint, irregular, and more or less dark. It is ovoid, narrowed in front^ 

 and swells gradually even to the posterior end; obtuse and slightly recurved on the 

 ventral face. Length from 10 to 13""", width behind from 2 to 3""". (Neumann.) 



This parasite has been found in sheep in India and Australia. The 

 author has not observed it in this country. It oc3urs scattered amongst 

 the large villi of the rumen or first stomach, attached by its posterior 

 sucker. It is said to cause but little digestive disturbance. Figures 

 and description of this parasite are presented, as it is a representative 

 of the genus, and may sometime serve for generic determination of 

 allied parasites which may be found in this country. 



138 



