PARASITES OF THE ALIMENTARY TRACT 73 
Small Intestine. 
CESTODES OF THE OX. 
The three tapeworms inhabiting the ox belong to the 
Anoplocephaline, or unarmed worms. These have the 
genital pore double in each segntent, all of which are 
much broader than long. 
The three tapeworms are: 
I. Tenia expansa. 
2. Tenia alba. 
3. Tenia planissima. 
Tenia Expansa.—This is the commonest and also the 
largest tapeworm of the ox. It ranges in length from 
Fic. 18,—HEAaAD oF T2NIA Fic. 19.—HEAD oF TANIA 
EXPANSA. ALBA. 
25 to too feet. The anterior segments are narrow, 
but the ripe posterior segments are very short, and are 
usually an inch wide. The head is small and slightly 
flattened, and the suckers are arranged in the form of 
four oval slits. 
Tenia Alba.—Next to Tenia expansa, this is most 
commonly found. It averages about 6 feet in length, 
and the widest segments reach from 3 inch to 2inch. The 
segments are proportionately longer than those of Tenia 
expansa, and are of a dense whiteness. On holding the 
