TAPE WORMS. 157 



the sheep or cow, they either reach the brain in the same way, 

 and become the Ccenurus cerebralis, which has been actually 

 demonstrated by Professor Haubner at the Veterinary School of 

 Dresden, though on this point the opinions of Siebold and 

 Kuchenmeister are directly opposed ; or, should the ovum take 

 another direction, it becomes the Cysticercus tenuicollis, being 

 attached to the serous membrane of the abdomen or thorax, but 

 chiefly in close proximity with the liver. Lastly, when it is 

 swallowed by the pig, it reaches the muscular substance of that 

 animal, and becomes the Cysticercus cellulosce, which gives the 

 appearance known as measly pork. Siebold is again at variance 

 with Kuchenmeister on this point, the former maintaining the 

 possibility of producing the Tcenia serrata from Cysticercus 

 cellulosce, while the latter disputes it altogether. An affirmative 

 experiment is, however, always stronger than a negative one, 

 and I am inclined to place great reliance on the observations 

 of Von Siebold, so that I do not hesitate to accept his experiments 

 on this subject. I am led to this conclusion from knowing that 

 these two authors disagree on the identity of Tcenia solium 

 and T. serrata ; but as I confess that I can see no difference 

 between the two worms, either with the naked eye or under the 

 microscope, I am led to believe Von Siebold, with whom my own 

 observations agree. 



THE FOUR FOLLOWING CESTOIDEA may therefore be considered as 

 the origin of Tcenia serrata in the dog, viz. : 1. Cysticercus 

 pisiformis, found in the rabbit and hare ; 2. Ccenurus cerebralis, 

 infesting the brain of the sheep, calf, &c. producing ' gid ; ' 



