1040 DR. F. E. BEDDARD ON 
are to be observed. In the strobila region the segments ‘are 
at first very narrow; but they increase in length posteriorly, 
though never reaching a greater length than diameter. The 
hinder margins on either side project in the more mature 
segments over the following segment. The last segment of the 
body was often to be seen; it was narrower and a trifle longer 
than those immediately preceding it and somewhat oval in form. 
As already remarked, this segment did not prove to be sterile. 
Text-figure 1. 
LeSs 
Moncecocestus erethizontis. 
A. General view of scolex and anterior proglottids. 
B. A few anterior proglottids, illustrating relative positions of receptaculum 
seminis and cirrus-sac. 
p. Genital pore. 7.s. Receptaculum seminis. 
The genital pores alternate with rigid regularity from side to side 
of the body. The cirrus was frequently seen to be protruded, 
and very often an oval body bearing the cirrus also projected ~ 
trom the side; on making sections this body proved not to be the 
protruded cirrus-sac as might have been anticipated, but that 
sac surrounded by a certain part of the medullary tissue which 
together formed a marked bulge upon the side of the segment. 
