TAPE WORMS. 159 



Siebold, as well as by other observers at the request of the former of 

 these authorities. This Tcenia has been actually developed in the 

 dog from Cysticercus pisiformis by Kiichenmeister, Van Benedin, 

 Siebold, and Baillet ; from (7. tenuicollis and C. cellulosce by 

 Siebold, and from Ccenurus cerebralis by Von Siebold and Van 

 Benedin. It is possible that there may be some inaccuracy in the 

 details of their experiments, but from this concurrent strong 



Taenia cucumerina. 



testimony there can be no doubt that Tcenia serrata in the dog- 

 is developed from some one or more cystic worms infesting an 

 herbivorous animal, which in its turn has received the ovum 

 producing it from the intestine of the dog. 



The Tcenia cucumerina, as already observed, differs from T. 

 serrata in being shorter in its entire length, seldom reaching to 

 more than one quarter of that to which the longer worm extends, 

 which varies from two to three yards. It gives off its segments 



