INJURIES CAUSED BY TAPE£-WORMS. 115 
The common human tape-worm, Tenia soliwm Linn., 
varies from ten to thirty feet in length ; there are upward 
of eight hundred joints in a worm ten feet long. The head 
ends in a rostellum or proboscis armed with a double crown 
of hooks ; the first proglottis or sexually mature segment 
begins at the 450th. While in some persons the presence 
of a tape-worm is simply an annoyance, in nervous and irri- 
table persons it causes restlessness, undue anxiety, and vari- 
ous dyspeptic symptoms. In rare cases (over a hundred are 
known) death has resulted from the presence of the Cysticer- 
Fig. 75.—Cysti- 
eercus, or larval 
‘Tape-worm, 
Fig. 76.—Head of Tenia acanthotrias (Cysticercus) 
enlarged, showing the suckers (S) and circle of hooks. 
cus in the brain. ‘‘ Cysticerci may develop themselves in 
almost any situation in the human body, but they occur 
most frequently in the subcutaneous, areolar, and intermus- 
cular connective tissue ; next, most commonly in the brain 
and eye; and, lastly, in the substance of the heart and other 
viscera of the trunk ’’ (Cobbold). Among the preventive rem- 
edies against tape-worms is the disuse of raw or underdone 
pork, and ‘‘ measly’’ pork—+.e., the flesh of swine contain- 
ing the little bladder-like vesicles. Cysticerci, or larval tape- 
worms, can be readily distinguished, but when thoroughly 
cooked are harmless, as the temperature of boiling water is 
