178 PARASITOLOGY. 
TAENIA Expansa (Expansus—broad). 
Synonym.—Moniesia Planissima. Moniesia Ex- 
pansa. 
Distribution. —Common in the United States, es- 
pecially in range cattle. 
Descriftion.—Its head is very small, and is pro- 
vided with four sucker discs; the head is followed 
by along, slender neck; the segments of specimens 
from cattle often measure an inch in width; these 
widest segments are only about one-eighth of an 
q 
t 
8 ——~——-7 
Fig. 66 —TAENIA EXPANSA (from 0x). 
a, Head. c, Mature segments, 
b, Neck, d, Partially developed segments. 
inch long. The specimens infesting sheép measure 
only about one-half inch in width. The worm is 
thin and segments translucent ; each segment is pro- 
vided with two genital pores; one located at each 
margin. This worm may reach the length of twenty 
to forty feet. 
Life Cycle.—Animals are supposed to become in- 
