59 



ent kinds are but barren cysts of either one or the 

 other species. Such they are ; and Kiichenmeister 

 in his work refers them as derived from 



1. Taenia Echinococcus scolicipariens. 

 2. Tsenia Echinococcus altricipariens. 

 3. Tsenia ex Cysticerco tenuicolli. 



To the first class he refers those acephalocysts 

 which bear no daughter vesicles in their interior. 



To the second class he refers those acephalocysts 

 which have a formation of daughter vesicles, but no 

 scolices ; and he observes, that " the only remarkable 

 thing, perhaps, is the circumstance, that the envelop- 

 ing cysts of acephalocysts, with clear watery contents 

 and of small size, are thicker and more cartilaginous 

 than those of the true proliferant Echinococci, in 

 which a similar structure of the cyst usually occurs 

 only in large colonies, or in those which contain 

 the remains of dead scolices and purulent grumous 

 masses. And, 



In the third case, Kiichenmeister, while administer- 

 ing to a lamb the eggs of a T. ex Cysticerco tenuicolli, 

 found a sterile C. tenuicollis in the midst of hundreds 

 of other equal sized and fully developed Cysticerci of 

 this species. This sterile one bore perfectly distinct 

 indications of life ; and he furthermore says, that, 

 although he knows of no other specimens of Cysti- 

 cerci or Ceenuri having been met with in a living but 

 barren state, yet it undoubtedly is a possible thing. 



