149 
evidence that the characteristic secretion of the prostatic giands is 
not absent in this rudimentary organ. Extra-capsular giand cells 
are reduced to the uttermost degree, and only a diligent search 
reveals them, as this secretion has a staining ability similar to that 
of muscular fibres. 
The position and the structure of this coecal appendage eliminates 
the doubts that it really answers to a vesicula granulorum, although 
Text-fig. 30. Enterogonia pigrans var. novæ-zealandiæ. Sagittal section of the postenor 
part of the hody. 10 x. i, intestinal branch ; mi, main intestine ; php, pharyngeal 
^ ' pocket; s. shell giands. 
it is more poorly developed than is the case in any other Stylochid. 
It is evident that the prostatic vesicle of Enterogonia is a purely 
vestigial organ of no apparent functional significance. As can be 
concluded from what has been said, the true ductus ejaculatorius 
enters the prostatic vesicle in its distal part and the common duet 
thus formed then continues downwards forming an angle with the 
ductus ejaculatorius. After ingressing the basis of the penis, it 
traverses in a straight course this organ in its entire length. 
In the antral epithelium provided with ridges there are no cells 
that could be mistaken for prostatic giand cells. The antrum is 
longer than in Haswell’s diagram. 
It rOmains to mention that in full agreement with Haswell s 
statement the two sinuous seminal canals do not form any false 
seminal vesicles. 
As regards the general appearance of the female apparatus, it 
is sufficient to refer to my text-figure 30 and the photograph 
(Plate IV, Fig. 24), as it agrees well with Haswell’s account and 
schematic diagram (1. c., PI. 37, Fig. 4). The spiral ridge in the 
proximal part of the shell duet (ootype) is also present, and only 
the epithelium is involved in its development, as indicated in the 
figure presented by Haswell and as I have above related regarding some 
other Stylochids. The ductus genito-intestinalis has a structure that 
