CESTODA 



57 



This explains the comparative difficulty we find in procuring a 

 specimen of the armed tapeworm with the head attached. 



FIG. 20. Head of Tania mcdiocanellata. Showing the calcareous corpuscles, suckers, rudimentary 

 proboscis, and water vessels. Highly magnified. Original. 



The establishment of this species as distinct from T. solium 

 is due to Kiichenmeister ; but it is curious to observe how 

 accurately this determination was foreshadowed by the shrewd 

 naturalist and theologian, J. A. E. Goeze, who clearly indicated 

 two forms of the common tapeworm, remarking (1. c., Bibl. No. 

 1, s. 278): "Die erste ist die bekannte grosse, mit langen 

 dicken und gemasteten Gliedern, die ich Tania cucurlitina, 

 grandis, saginata, nennen will." The same author (s. 245) 

 pointed out the resemblance subsisting between the tapeworm 

 of the cat (T. crassicollis) and the vesicles (" Krystallblasen ") 

 and their contained " erbsformige Blasen " (Cysticercus fascio- 

 laris ) of the mouse. Thus the celebrated pastor of St BJasius, 

 in Quedlinberg, almost contemporaneously with Pallas, early 



