138 
layer very much resembles a connective tissue. No bodies of gland 
cells have been observed inside the vesicle. The interior of the 
vesicle does not present [such regular-looking chambers as are 
characteristic of the vesicula granulorum in Stylochiis, but the 
Text-fig. 25. 
Kaburakia excelsa. Genital 
apparatus as it appears in 
v'entral aspect on the 
animal mounted in cedar- 
wood oil. 30 X. dva, ductus 
vaginalis with its openiiig 
to the exterior; e, egg on 
the way to vagina, having 
entered the median uterine 
canal; fvs, false seinmal 
vesicle; prv, prostatic 
vesich'. The outline of the 
niuscnlaris of the lower 
parts of the female appa¬ 
ratus is dotted, as is also 
the inuscle envelope of the 
vesicula granulorum. 
interior wall (epithelium and underlying layer) 
projects in numerous folds of different size 
and direction (text-fig. 26). The vesicula 
granulorum is thus more complicated and 
far better developed than the strongly reduced 
prostatic vesicle of Cryptophallus. I shall 
further emphasize that the location of it is 
also quite another than in that genus, having 
the same orientation as that of Stylochus^ 
Idioplanoides, etc. It remains to mention that 
the club-like shape of the organ is mainly 
caused by the gradual increase of the mus- 
cular envelope in anterior direction. 
The ductus ejaculatorius joins the likewise 
sinuous efferent duet of the prostatic vesicle 
at the basal third of the penis. This organ 
is inserted in the upper part of the antrum 
masculinum and thus has a vertical position. 
In the animal sectioned the penis is casu- 
ally bent anteriorwards near the apex (Plate 
IV, Fig. 29). The penis is unarmed, rather 
short, with the apical part narrow and taper¬ 
ing. Formed by outer finer circular and 
inner stouter longitudinal fibres in several 
rows, its muscularis is not thick. The antrum 
masculinum, of moderate size, has a strong 
muscular wall and a glandless ciliated epi¬ 
thelium. It may be mentioned that the antrum is partly filled with 
a mass of prostatic secretion intermingled wih sperma, and that 
sperma filis the penis canal as well as the ductus ejaculatorius 
(Plate IV, Fig. 29). 
Female apparatus: This is of considerable interest as we 
here meet with a ductus vaginalis. Such a duet is previously known 
in the family Stylochidae for the genus Cryptophallus (Bock 1913), 
