IF 
DORIDOEIDES GARDINERI. 287 
plete loop, after which it first dilates into a prostatic portion 
(but without any trace of a separate prostate gland) and 
then contracts into a muscular portion, terminating in a thin 
conical glans penis (fig. 9, e). No trace of spicules or other 
armature was found in this or any part of the genitalia. 
After the main bifurcation dividing the male and female 
branches, the female branch runs backwards for a little 
distance as a short tube and then itself bifurcates. A short 
duct leads to the spermatotheca (fig. 9, g), which is large, 
globular, and single, no trace of a second receptaculum 
seminis being found. The walls of the spermatotheca are 
thick, and produce a secretion. In some specimens small 
clumps of spermatozoa are embedded in this secretion. In 
others all the spermatozoa form a central mass in the main 
cavity of the spermatotheca. It is possible that the secre- 
tion serves to form small packets of spermatozoa or sperma- 
tophores. The spermatotheca communicates by a long thin 
duct with the vaginal opening (fig. 9, h) which les at the 
base of the penis. The other division of the female branch 
enters the mucus! gland (fig. 9, 7), enclosing the albumen! 
gland (fig. 9, Z), which is smaller. The mucus gland commu- 
nicates with the exterior directly by a slit-lke irregular 
aperture (fig. 9, 7) which lies a little behind the other orifices 
and is much larger than they are. Only spermatozoa are to 
be found in the ducts and in the spermatotheca. There are 
no ova except in the hermaphrodite gland, where they are 
in process of ripening or nearly ripe. 
In all the specimens examined microscopically were found 
scattered cells which do not seem to form part of the essential 
bodily structure. They are large and rounded in outline, with 
vacuolated contents and a large round nucleus. ‘They occur 
chiefly in the connective tissue spaces, in spaces hollowed 
out in the dermal muscle layers and among the epidermal 
cells. The fact that they are absent from the cavities of all 
the internal organs and from the lacunar blood spaces, and 
1 The functions of these glands are presumably as indicated by their names, 
but it is not easy to say which is which. 
