INTERNAL PARASITES. (eNTOZOA.) 



in the bowel. Thus Fig. 26 represents two hydatids, one 

 being viewed from without, and the other from within. At A 

 the young tapeworm heads are seen projecting from the ex- 

 terior surface of the hydatid ; whilst at B they are seen re- 

 tracted within the interior of the bladder-worm. There may 

 be from three to five hundred of these heads projecting from 

 the surface of a single gid-hydatid. 



Vis. 26. 

 Larv.^ of the Gid Tapeworm. (Newman.) 



If a small fragment of the gid-hydatid with its charac- 

 teristic processes be magnified about eighty diameters, all the 

 more essential structures will be brought into view. As in 



Fig. 27. 

 Tapeworm-like Heads of the Gid-Hydatid. (Newman.) 



