AND 



MESSMATES. 



222 AfflKAI, PARASITES 



J It was with these cysticerci that * made experiments 



f iTdoKB which I took with me to Paris, in order to 



011 nee those who could not helieve m the migration 



°f nV arasites. It was this species that I gave also to the 



doss which served as a demonstration at Paris at the 



course of lectures given by Mons. Lacaze Duthiers. 



Some years ago, while making a post-mortem ex- 

 amination, at the Museum of Paris, of some young dogs 

 which I had previously infected' with Taenia serrata at 

 Louvain, there were found by the side of these some Tieniee 

 cucumerinm. These dogs had taken nothing but milk 

 and cysticerci ! Whence came these Tmnise cucumerinm? 

 I knew not, and I frankly owned it to the members of 

 the Commission who proposed the question to me. This 

 however did not prevent my being greatly puzzled with 

 the presence of this worm of whose origin I had no idea. 

 Now we know whence they came. An acaris, the Tri- 

 chodectes, lives in the hair of young dogs and harbours 

 the scolex of this cestode. The dog, by licking its own 

 hair, grows infested, like the horse, which in a similar 

 manner introduces the gad-fly, and although it has taken 

 no other nourishment, harbours its own epizoaria. 



The name of Cysticercus tenuicollis has been given to 



a vesicular worm which inhabits the peritoneum of the 



ox, the goat, the sheep, &c, and which turns to a taenia 



in the digestive tube of the dog. Mons. Baillet has made 



the principal experiments on this transmigration. The 



itinerary of another cestode worm, the Ccemrus of the 



sheep, is to pass through the sheep in or fo x t reach the 



wolf or the dog. TJus worm has only lately been recog- 



nized in its tsenoid form ; it has on +»,„ ± t. 



long inown under the name of CceZl ^^^ *"? 



^cenums cerebralis ; this 



