74 VETERINARY PARASITOLOGY 
worm between the eyes and the light an opaque line 
may be seen running the whole length of each segment, 
about $ inch from the edge. The head is large, and 
extends beyond the adjoining segments, while the 
suckers, unlike those of Tenia expansa, are round. 
Tenia Planissima, or Denticulata.—This worm ranges 
from 3 to 6 feet in length only, and is characterized by 
a serrated edge, which is due to the overlapping of each 
anterior segment. The head is by no means large, and 
the suckers are slightly elongated. 
5 Symptoms.—The presence of 
| tapeworms in the ox is seldom 
suspected until some have been 
passed with the feces. If in large 
numbers, they may cause anemia, 
loss of condition, depraved appetite, 
and diarrhcea. By coiling them- 
Fic. 20.—Heap oF selves together into a ball, they 
Tania DENTICULATA. : : : 
may cause intestinal obstruction. 
Treaiment.—As these worms are unarmed, vermicides 
and purgatives will remove them with little difficulty. 
Lysol, turpentine, male-fern, areca-nut, given in 
linseed-oil, are quite efficient. 
Arsenic, in doses of ro grains daily, may be given to 
oxen for three or four consecutive days. 
Strongylus Ventricosus.—This worm is the inhabitant 
of the small intestines of cattle and deer. It is a com- 
paratively small worm, the female reaching only 
12 millimetres in length, and the male 6 to 8 millimetres, 
In the male there is a broad caudal pouch, which is not 
distinctly trilabiate. 
In the female the vulva is situated just behind the 
middle of the body, and is surrounded by a pouch. 
Professor Penberthy has associated this worm with cases 
of parasitic gastro-enteritis in cattle and sheep, while 
other observers regard it as producing no ill-effects. 
- = SS 
