3 12 
Male Reproductive Organs .—Observe a similar 
arrangement to the female organs, the testis being, 
however, a smaller and finer tube than the ovary and 
ending on either side in coiled vasa deferentia, which 
finally enter the large 6 white gland. 5 The ejaculatory 
duct ends in a chitinous penis (Fig. 103). 
The Mouth Parts. —Behind the place of the origin 
of the palps a small portion of the mouth is completely 
closed in. Here the pharynx opens ventrally by a 
slit-like opening protected by a narrow tongue of 
chitin ; and into the two posterior angles open the 
large salivary ducts of either side (Fig. 105). 
Fig. 105. Mouth-farts of Ornithodoros 
(1) Longitudinal section; (2) Transverse section 
T he Pharynx and Endosclerite. — Macerate a 
specimen of Ornithodoros after removing the dorsal 
chitin by boiling in caustic potash (ten per cent.). 
Make out the following (Fig. 105) 
(1) A broad sheet of chitin which lies horizontally 
and divides the cavity of the rostrum into an upper 
and a lower portion. This projects behind well into 
the body cavity, and is connected anteriorly with the 
dense chitin about the base of the palps and back 
portion of the buccal cavity. 
