PARASITOLOGY, 187 
collapses. Cysts have been known to retain their 
vitality for many years. Dogs consuming these 
cysts develop the mature worm. 
Animals Infested.—The adult Taenia infests the 
dog; the larval (cystic or hydatic) form infests the 
hog, sheep, ox and man. 
Of 1814 hogs killed at the Spartanburg, S. C., muni- 
cipal abattoir from March 13, 1913 to March 1, 1914 
2.3% were affected by the Cysticercus Echinococcus 
of the liver. 
Parts Infested.—The adult is found in the small in- 
testines; the larval form in the liver, principally; 
occasionally in the lungs and sometimes in other 
organs. Sections of liver adjacent to the cyst shows 
eosinophilia. 
Symptoms.—When the cysts invade an organ to a 
sufficient extent they interfere with the functions of 
that organ; animals so infested gradually lose con- 
dition; there is loss of appetite, jaundice, oedema 
under breast or neck and jaws; nervous disorders if 
they should invade the brain. 
In dogs, infestation by myriads of adults, produces 
indigestion, nervousness, nausea and gradual loss of 
condition. 
TAENIA COENURUS (Common tail). 
Distribution —Found in European countries; re- 
ported in the United States from New York and 
Montana by Hall. 
Description.—The head is small and provided with 
four sucker discs and a rostellum of from twenty-two 
to thirty-two hooklets; the neck is narrow; the 
mature segments are as long as wide; the genital 
a 
