290 



PARASITES OF ANIMALS 



On examining some of the larger papillaa they were found to 

 consist of membranous layers folded one within the other. 

 These were carefully dissected and examined with the aid of 

 needles, when each one showed in the centre a well-formed 



FIG. 54. Ccenurus lemuris. 1, Coleny; 2, portion of the ectocyst (enlarged) ; 3, scoler- 

 heutl (magnified 40 diameters) ; 4, hooks (magnified 260 diameters). Origin*!. 



tapeworm head with four characteristic suckers, and a promi- 

 nent rostellum supporting a double coronet of hooks, thirty-two 

 of the latter in all (3, fig. 54). The hooks displayed a marked 

 disparity of size and form. Each hook showed conspicuous 

 anterior and posterior root-processes, the larger set of hooks 

 individually measuring about $" and the smaller </' ^ n length 



