EXAMINATION OF CYSTICERCOID STAGES 173 



layer of ring-shaped muscles ; and within this again, a thick band of 

 longitudinal muscles, which appear in the section as transversely cut 

 tubes. The space between the muscular structure of the body and the 

 intestinal wall is filled with connective tissue, containing many 

 pigmented cell agglomerations. In the centre of the section is the 

 intestine, more or less completely filled with blood, flanked by the 

 intestinal diverticula, which are severed transversely. Upon the 

 dorsal aspect of the intestine is the dorsal vessel ; ventrally of it, 

 the ventral cord ; and between the intestinal diverticula and the 

 periphery are the lateral vessels. The ventral field also contains the 

 excretory vessels in transverse or diagonal section, as well as sections 

 of the testes, placed right and left of the ventral cord. 



Sections taken at the level of the pharynx or of the genital orifices 

 illustrate very different conditions. Median sections through the 

 anterior end are particularly interesting, as they show the structure 

 and the method of function of the organs employed in the sucking act. 



