432 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 86 



epithelium underlain by an indistinct muscularis, of inner circular 

 and outer longitudinal fibers. From just behind the genital canal 

 leading to the genital pore, the female canal starts and proceeds 

 straight posteriorly, then widens into a chamber, which receives the 

 two oviducts. The proximal part of this female canal is called va- 

 gina by Bendl (1908), but as it has no special musculature it is best 

 regarded as a glandular duct. Gland cells were not evident in the 

 present specimen ; Bendl figures many opening into the duct. From 

 the chamber that receives the oviducts, a tube runs anteriorly again, 



2 



Figure 50. — Species of Bipalidm and Rhyxchodemcs 



a, Bipaliuni costaricensis, new species: Showing eye arrangement — left lialf (V) is 

 ventral surface, right half (D) is dorsal surface. 

 i, c, Rhynchodcmus ten-estris (O. F. Miiller) : b, Wisconsin specimen, side view; c, sagittal 

 view of copulatory complex. 



1, External seminal vesicle of vas deferens ; 2, penis bulb ; 3, internal seminal vesicle in 

 penis bulb; i, mlalo atrium; 5, penis papilla; fi, genital pore; 7, seminal bursa (so-called 

 uterus) ; 8, genito-intestinal duct from same to intestine; 9, entrance of oviducts; 10, 

 glandular duct. 



