126 



ENTOZOA. 



distended by the presence of soft, irregular bundles of tissue in its 

 interior. This tissue occurred in the form of shreds or rope-Hke 

 coils {c, fig. 27), which became finely attenuated below, depending 

 loosely into the cavity of the caudal vesicle. Histologically, these 

 shreds merely consisted of a fine granular matter, and therefore were 

 not referable to any specialized structure or set of organs. Neither 

 the body nor the vesicle exhibited the transverse striae seen in the 

 Cysticercus fi-om the Wart Hog ; but in addition to a few irregu- 

 lar surface-foldings, the fining membrane of the vesicle gave ofiP 



Fig. 28. — Crown of hooks from the Cysticercus fasciolaris of the mouse ; highly magnified. — Busk. 



here and there some extremely delicate thread-like filaments, hav- 

 ing the same structural character as those bundles of granular 

 parenchyma just described. Little circular spots (e) marked their 

 origin ; and from these points they were suspended in the fluid 

 contents of the vesicle. 



The Cysticercus fasciolaris found in the liver of rats and mice 

 presents a very difierent appearance to the above. Here, the cau- 

 dal vesicle is generally reduced to the size of a pea, or is very much 



