THNIA. 341 
Tania Coenurus is the product of the ccenurus cerebralis, which, in the 
brain of sheep, gives rise to the disease known as turnside, so called because 
the affected animal moves about in a circle. This tape-worm, which springs 
from it, is usually about fifteen inches long, but it has been known to attain a 
length of over three feet. While sheep are the common source of the larva, 
none of the ruminants are exempt; and although the brain is very generally 
affected, the larve have been, in very rare instances, found in the spinal cord. 
Tenia Saginata.—1. Portions of the worm of natural size. 2. A number of cysticerci, 
from which the tape-worm is developed, of nearly natural size, situated in the fibres of a 
muscle. 3. A magnified cysticercus, with its head and neck protruded. 4. Head of the worm 
magnified. 5. Fully grown joint of the worm. 
The head of the parasite is small, of pear-shape, and provided with sucking 
disks as well as hooks. 
Tenia Serrata, so called because the margins of its body are serrated like 
the cutting edge of a saw, when fully mature is from two to three and one- 
half feet in length. Evidently it belongs to the same species as the solium. 
Sporting dogs are quite frequent victims, and infested through eating the 
entrails of hares and rabbits. When the eggs of the parasite are discharged 
from the intestines of dogs and taken up by sheep they develop into the 
