44 
Suffice it to say that the substance alluded to may at once be dis- 
tinguished from the sperm-mothercells by its having a much less 
granular appearance with weak powers, no separate cells being det- 
ected with strong ones. Here and there it has moreover a cu- 
rious thread-like appearance, as if it had been formed out of sticky 
threads, twisted into a mass. Ova and bloodcorpuscles — as 
was noticed above — are very eften found imbedded in it. Sec- 
tions show that this substance principally accumulates in the 
inferior lobes of the germinal sacs, i. e. in those which are 
closest to the intestinal epithelium (fig. 51). It is very probable 
that this substance is the same as that which TULLBERG discovered 
in Neomenia (see p. 36), which he designates as “laminae ofa yel- 
low shining substance” and for which he offers no further explana- 
tion. In the specimens examined the substance was not found in 
sections through the anterior cephalic portions of the hermaprodite 
gland, where only spermatozoa and ova were present, but it at- 
tained a considerable development close to the posterior passage 
hg by wich this gland communicates with the posterior median 
cavity P (fig. 46). In the ducts hg this substance, ova and sperm- 
atozoa were indiscriminately found, however in very limited quan- 
tities compared to the advanced stage of development which the 
genital products had attained in the hermaphrodite gland along 
the body. The walls of these ducts (fig. 38) clothed with a colum- 
nar ciliated epithelium are considerably folded, so that they may be 
able to undergo a suflicient dilatation for the passage of a more con- 
siderable portion of the genital products. 
These two deferent ducts of the hermaphrodite gland next com- 
municate with ihe median cavity P (figs. 46 & 47). This cavity 
is dorsally applied against the bodywall and ventrally rests upon 
the posterior extremity of the intestine. I could only examine 
this bag in one of my speeimens, as it had been destroyed in the 
other, which had been injured as noticed above. For this reason 
I must make a certain reserve about its exact shape: it may in 
reality be more ovoid or more spherical than would appear from 
my figure. It is internally furnished with a columnar epithelium, 
