148 
characterized by a large number of peculiar prostatic organs 
arranged in the wall of the penis and I found consequently no 
reason to regard the unicellular giands of the antral epithelium of 
Enterogonia as homologous formations. 
The examination of the material of Enterogonia from New Zea¬ 
land has now, however, given remarkable and unexpected proof 
that the genus without doubt 
belongs to the fåmily Stylochidae. 
This is at present one of the best 
known families, and is very natural 
in the restriction I gave it in 
1913. A doser study of the male 
apparatus of Enterogonia has 
revealed the faet that a pro¬ 
static vesicle is not absent. 
Its rudimentary nature together 
with the very sinuous course of 
the ductus ejaculatorius makes 
it very excusable to overlook it. 
Moreover, a superficial obser¬ 
vation of the genital apparatus 
in my series of sections would 
give the impression that a prostatic vesicle is lacking, as with 
ordinary microscopic magnification it could easily be mistaken for 
one of the many loops of the ductus ejaculatorius, of which there 
are several transsections on the longitudinal sections through the 
male apparatus (Plate IV, Fig. 31). 
In the last loop of ductus ejaculatorius (de), which lies above 
the penis, there is a coecal appendage projecting on its dorsal 
side. The muscularis of this little vesicle (text-fig. 29, prv) is 
somewhat stronger than that of the ductus ejaculatorius, and it 
shows the peculiar basket-work characteristic of the vesicula granu- 
lorum. Its epithelial lining, without folds, is mueh higher than 
that of the ductus and is provided with unusually long cilia. They 
are visible on the photograph reproduced (Plate IV, Fig. 31). 
Examined with an oil immersion lens, the epithelium shows a 
number of small gobiets in its outer part, and the presence of 
small eosinophilous granulae there as well as among the cilia gives 
Text-fig. 29. Enterogonia pigrans var. 
novæ-zealandiæ. The male organ. 
45 X. de, ductus ejaculatorus; 
mi, main intestine; p, penis; 
prv, prostatic vesicle. 
