OKIGIN OF CYSTICA AND CESTOIDEA. 67 



human brain, which, when put into luke-warm water thirty-six 

 hours after the death of the subject,, still moved, I would not, few 

 as they were, allow the opportunity to pass of making an experi- 

 ment of feeding with them ; nevertheless the young dog to whom 

 I administered them on the 22d May, and who was killed on the 

 14th June, that is twenty-three days after receiving them, showed 

 not the slightest trace of a tape-worm or scolex. 



Third experiment. On the 18th June, a young poodle 

 swallowed two-and-forty Cysticerci from the pig, deprived of their 

 cysts. The examination of this dog, on the 4th August, fifty-one 

 days after feeding, showed eight tape-worms of different lengths. 

 The smallest individual measured one inch and a quarter, a few 

 others measured five and a half to seventeen and a quarter inches, 

 a larger individual was twenty-five and a quarter inches long, 

 whilst the three largest individuals had attained the length of 

 fifty-one inches. Notwithstanding the length which the worms 

 had attained, and the great number of their joints, I could 

 discover no. perfectly developed eggs in any of the latter. 



Fourth experiment. To a young pug-dog two and thirty 

 Cysterci, without cysts, were administered on the llth July, and 

 five-and-forty on the 17th. On the 21st July the dog was killed. 

 On inspecting the small intestine forty-six scolices were found, of 

 which the shortest measured one line, the longest six. All bore 

 the characteristic scar on their posterior extremities. The smallest 

 individuals consisted of nothing else than the head and neck of 

 the Cysticercus celluloses. The remaining and somewhat longer 

 individuals had a transversely wrinkled body, which as yet bore 

 no traces of joints. 



Fifth experiment. On the 8th August, a young setter was fed 

 with five-and-forty Cysticerci, which were still in their cysts and 

 enclosed in flesh. On the 21st August, this dog was likewise 

 killed. In his small intestine only a few tape- worms in 

 course of development, of three fourths of an inch in length, 

 were found. 



I must here remark that the dogs I made use of for the second, 

 fourth, and fifth experiments were troubled with the distemper, a 

 thing of common occurrence amongst young dogs, and that the 

 disease had probably had an injurious effect upon the development 

 of the tape-worms. Notwithstanding that these experiments of 

 feeding the dogs with Cysticercus cellulosae afforded no such com- 

 pletely favorable results as the foregoing series, they nevertheless 



