DISTRIBUTION AND CLASSIFICATION OF ONYCHOPHORA. 38) 
8. Oviduct is provided with a receptaculum ovorum 
(Fig. 3). 
¥ic. 3.—Female generative organs of P. trinidadensis. (After 
Gaffron.) 7. Funiculus. 2. Ovary. 38. Duct or funnel of the re- 
ceptaculum ovorum; the latter is not shown. 4, Receptaculum 
seminis with its two ducts. 5. Anterior end of uterus. 
9, The oviducts are united at the ovary (Fig. 3). 
10. The ovary is endogenous, i.e. the wall of the ovarian 
tube is thick, and the ova lie in the thickness of the epi- 
thelium (Fig. 4). This character was first called attention to 
by Willey (1898), who contrasts it with the condition found 
in Capo- and Austro-Peripatus, etc., in which the wall of 
the ovary is thin, and the maturing ova do not retain their 
