176 



ZOOLOGY FOR MEDICAL STUDENTS 



CHAP. 



The cysticercus stage (C. bovis) occurs amongst the muscles of the ox 

 ("measly" beef). 



Taenia solium (Fig. 80, A) is a common tape-worm of pork-eating 

 countries. It measures from six to nine feet in lengthy has well-developed 

 hooks, and its uterus in the old proglottis possesses on each side only 

 relatively few (seven to ten) and relatively stout branches. The ovary 



Fig. 80. 



Three important human tape-worms (A, Taenia solium ; B, T. saginata ; C, Bothriocepkalus 

 lotus) : Dlustrating the more conspicuous distinguishing features of the scolex (upper row of figures) 

 and of the old proglottis (lower row). 



in addition to the main lobe at each end possesses a small branch near 

 the middle. 



The bladder- worm (Cysticercus cellulosae) occurs normally amongst 

 the muscles of the pig but has been found in various other animals — 

 dog, cat, rat, even in man himself. 



Taenia echinococcus occurs not uncommonly in the dog in various 

 parts of the world. It is more frequent than elsewhere in Iceland, 

 Australia, and the stock-raising portions of South America. Its most 



