94 



NEMATHELMINTHES 



Trichuris trichiura {Trichocephalus trichiwis) lives in the large 

 intestine near the cecum of man. It does not move and is sup- 

 posed to be of little injury. The posterior part of the body is 

 threadlike, while the anterior part is much narrower and hairlike. 

 Related species infest the colon and cecum of sheep, cattle, dogs 

 and hogs. 



embr 



B 



Fig. 38. A, Trichinella spiralis^ female. B, larvae in muscle, not yet encysted. 

 C, encysted larva. (From Daugherty after Leuckart. Courtesy of W. B. Saunders 

 Co.) 



