96 Dr. R. Kossman on the Entoniscidee. 
hand, Fraisse did not find the orifices of the oviducts, unless 
these were his testes. 
But then his figure 2 (pl. xxi.) evidently represents a trans- 
verse section through a young animal, and, indeed, one 
carried through the spot where the ovaries open. ‘The spot is 
sufficiently determined by his statement upon fig. 3. That it 
is a young animal appears with certainty from the fact that 
no developed ovary is to be seen in this section; for what he 
indicates as such is also in this case undoubtedly the fatty 
body. In my fig. 11 I give a section through this part of an 
immature female; and I think no one will fail to see its agree- 
ment with Fraisse’s fig. 2. What opens to the right in my 
figure is undoubtedly the oviduct ; it is sufficiently character- 
ized by cylinder-epithelium ; and to the left there is a zigzag 
tube, which certainly represents the immature ovary. ‘This, 
with its very small cells, is indeed scarcely distinguishable 
from an immature testis; but a section carried through a 
mature animal at the same spot leaves no doubt upon the 
matter. Fraisse’s elucidatory figures 16 and 17, indeed, appa- 
rently reproduce the appearance of a very moderately pre- 
served animal, and are therefore very indistinct; but I think 
I can recognize in fig. 17 the cylinder-epithelium of the 
oviduct, and in fig. 16 the zigzag-shaped immature ovarial tube 
filled with very small cells. The supposed spermatozoids 
represented in fig. 18 are enigmatical to me; but, whatever 
they may be, they do not look like spermatozoids, and they 
will never prove to us that we have here really to do with a 
testis. 
Giard tells us as good as nothing about the ovary: he says 
only (p. 687) that it shows four lateral prolongations, two 
anterior and two posterior, directed from above downwards 
towards the ventral surface of the Mntoniscus, and, further 
(p. 691), that he had already given the description of the 
ovary. His fig. 7, however, evidently corresponds to Fraisse’s 
fig. 2 and my fig. 11; and his “glandes collétériques”’ are 
therefore the immature ovaries. He says indeed that they 
open “ not far from the ovarial orifices,” im the neighbourhood 
of the small ventral process. All this, however, is not very 
positive. In the transverse section he shows these orifices as 
actually ventral; but those processes which he calls ventral 
are, as I have already shown, and as a glance at his figures 
will remind us, really dorsal. Even in this therefore there is 
a contradiction. Then it is very singular that he asserts he 
has seen the ovarial orifices, and yet indicates them in none 
of his figures. Moreover I am in doubt in what he saw them. 
€ 
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Was it in the adult animal ¢z toto? Here they are very 
