176 PARASITOLOGY. 
small intestines would attach itself to the mucous 
membrane by means of its four sucker discs and de- 
velop into the adult worm; if the meat is thoroughly 
cooked the larvae are destroyed. These cysts 
undergo degeneration as in the preceding species. 
The writer has observed cysts in the heart of a four 
year old steer in which many of the cysts had under- 
gone degeneration. The cystic tissues had been re- 
placed with a yellowish cheesy pus. The cystic 
larva is called cysticercus bovis. The infestation 
of beef with the cystic form of the Taenia Saginata 
is called measly beef. 
Animals Infested.—Man by the adult worm ; cattle 
by the larva. 
Parts Intested.—The adult infests the small intes- 
tines; the cystic form infests the muscle structures. 
The most common locations of these cysts are the 
masseter muscles, then the tongue and heart, and in 
badly infested cases in all tissues of the body. 
Symptoms.—The symptoms of animals and persons 
infested by this species are the same as that caused 
by the preceding species. 
TAPEWORMS OF HORSES. 
The tapeworms of horses are three. Their life 
history is unknown, and all are unarmed. They are 
rare in the United States. 
TAENIA PERFOLIATA (Per—through ; folium—leaf.) 
Description.—The head is large and globular in 
shape, and is provided with sucker discs; the neck 
is absent; the segments are very short and at the 
terminal end are about one-half inch wide. There 
