PARASITOLOGY. 159 
and attaches itself to the mucous membrane of the 
small intestines by means of its six rows of hooklets 
and develops into the adult worm. 
Animal Infested.—The hog. 
Parts Intested.—The small intestines. 
Condition Produced. — By the anchorage of the 
cephalic extremity, by means of its hooked proboscis, 
there is produced a small tumefaction which pushes 
the serous covering of the intestine out; from the 
serous surface of the bowel this nodule resembles a 
tubercle, and may be mistaken for tuberculosis; 
upon close examination the head of the echino- 
rhynchus will be found atta~**=4 +o the inner part of 
the nodule. 
Symptoms.—When infested by large numbers they 
may cause a loss of appetite, derangement of diges- 
tion, general unthrifty condition and later emaciation 
and convulsions; they may prove fatal among pigs. 
Treatment.—To remove the worms from the in- 
testinal tract the same treatment is used as for the 
Ascaris Suilla; to prevent the hogs from becoming 
infested it will be necessary to keep them on a board 
floor so that it will be impossible for the ova to 
reach the intermediate host, or to subject the feces 
laden with ova to an antiseptic solution; as the white 
worms are found most frequently in manure piles and 
in very rich earth, these are the most fertile fields 
for the intermediate host. 
EcHINORHYNCHUS CANIS. 
History.—It has been found in Texas. 
Animal Infested —Dog. 
Parts Infested —Small intestines. 
Description —About one-half inch long. The ce- 
phalic extremety is provided with a globe shaped 
