(b) A portion of the ovary consists of a delicate, 
much wrinkled membrane, which does not bear ova. 
Spermatheca .—Upon either side of the ovary the 
coiled oviducts ending in the middle line in the large 
bilobed spermatheca (Fig. 103). Open the sperma- 
theca, and note the presence of cyst-like bodies 
(spermatophores) containing masses of spermatozoa. 
Rectum .—Behind the spermatheca, observe the 
filamentous termination of the alimentary canal in the 
dilated rectum (Fig. 101). 
Note the thin walls, the entry of the two mal- 
pighian tubes into it, and its opening at the anus. 
Notn the oval or the dumb-bell shaped crystals of the 
contained secretion. 
Fig. 104. (1) Portion of ovary of Ornithodoros; 
(2) Ovum and follicle 
Malpighian Ruhules .—Note the great length of 
these and their tortuous course among the viscera 
(Fig. 101). Trace them from their origin in the rectum 
to their blind termination in the anterior portion of 
the body. Note, in some cases, small dilatations 
containing secretion similar to that in the rectum. 
