THE VETERINARIAN AS A NATURALIST. 
335 
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taenia cucumerina or taenia canina, whose cystic form was for 
long unknown until it was discovered in 1869, in the body of the 
dog-louse, the “ trichodectes latus.” The taenia litterata, the 
cystic form of which, I believe, is unknown. And, the taenia 
coenurus, whose hydatid form is developed in the cerebro-spinal 
cavity of the sheep. 
1 he digestive canal of the cat affords asylum to three species 
of taenia : The taenia crassicollis, cystic form the cysticercus 
fasciolaris, found in the liver of mice, and of various kinds of 
rats. The taenia elliptica and the taenia litterata, the latter 
being confounded with the taenia of the dog bearing that name. 
These may be said to be the principal taeniae found in the 
domestic animals, in the adult stage, but, as some hydatid forms, 
found in the muscles of our meat animals, develop into mature 
tapes in the human being, through the consumption of what is 
known as “measly flesh,” it may be interesting, as well as in¬ 
structive, from a public health standpoint, to allude to two 
taeniae which infest man. These are the taenia solium, and the * 
taenia mediocanellata or saginata. The cystic stage of the 
former of these parasites of man is the cysticercus cellulose, 
and is found in this form imbedded in the muscular tissues of 
the hog, and when this article of food is imperfectly cooked, or, 
at least, not sufficiently so to destroy the hydatid, the latter de¬ 
velops, in the human digestive canal, into the mature tape, the 
taenia solium. The second, the taenia mediocanellata or taenia 
saganata, of the human family, has its cystic form, the cysti- 
cerns bovis, in the flesh of the ox tribe ; and when this is par¬ 
taken of in a somewhat rare condition, with the hydatids re¬ 
maining possessed of vitality, taeniasis is produced, as in the 
former mentioned case. This fact ought to give emphasis to 
the urgent necessity for careful meat inspection by properly 
qualified individuals. 
As the study of the entozoa is one of interest to the natural¬ 
ist, may be pardoned for pursuing the subject a little further. 
The second variety of the plathelminths are the trematodes ; 
and those of chief importance to the veterinarian belong to the 
