The prostate vesicle (pr.) measures only 0.4 mm, a dimension 
that is rather small, both absolutely and relatively, for that of a 
Stylochid. It has a club-like shape, and is thickest in its rostral 
blind end. Without any distinet limit, it merges caudalwards into 
the short straight efferent duet. Consisting of sparse fibres, the 
museularis is remarkably thin. This ineonsiderable museular wall 
is piereed by wide gatherings of the efferent duets from the 
extraeapsular giand eells. Through its slight affinity to eosine the 
extremely fine-granular seeretion from these duets differs deeidedly 
from the somewhat eoarse-grained prostatie secretion from the 
intraeapsular giand eells. The intraeapsular giand layer forms a 
large number of short tubes that empty into the middle lumen of 
the vesiele. 
The antrum maseulinum is short and in its upper part is filled 
by the short „plug-like“ penis. Penis-sheath (— „Penisseheide“) 
and stylet is laeking. 
It might be mentioned here that on Yeri & Kaburaki’s figure 
of the eopulatory apparatus in N. fulvopunetatus the shell giands 
are indieated as having openings into the duet of Lang’s glandular 
vesiele, an error that must have originated in the use of staining 
agents, whieh has made it impossible to secure a elear eoneeption. 
The uteri are a pair of very long, wide, and dorso-ventrally 
winding eanals, whieh originate already in the prae-pharyngeal zone 
slightly baek of the level of the brain. Filled with eggs as mueh 
as 160 p long, the uterus-loops may reaeh both the dorsal and the 
ventral museular body-wall. A pregnant speeimen may at a time have 
approximately over a thousand eggs in the uteri. 
Although the male apparatus is small, the female one is extremely 
well-developed. The main gut, whieh eontinues over the latter, is 
eonsequently eompressed into a very narrow tube (text-fig. 12). 
The most striking feature is the good-sized Lang’s glandular vesiele. 
The vagina is also well-developed, espeeially in regard to the shell 
giand duet, whieh is a wide tube, the epithelial eovering of whieh 
sends out numerous ridges into the lumen. One partieular feature 
in the organization of the vagina is a speeial musele sphineter 
slightly inside the genital opening. On aeeount of this one might 
eonsider the outer part an antrum feminium. Its epithelium is gland- 
less and diminishes in height towards the inner end. Near the plaee 
