I 
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THE GENERATIVE AND EXCRETORY SYSTEM. 
The urogenital system of Proneomenia might well excite my 
special interest as both in Neomenia and O'haetoderma several points 
in the anatomy of these organs remain doubtful and very imper- 
fectly known and as the size of the specimens promised that in 
this case more definite results respecting both anatomy and histo- 
logy might perhaps be obtained. Although as mentioned above, 
one specimen was badly injured and part of its generative organs 
had specially suffered, still these expectations were in many res- 
pects fulfilled. 
Before describing the facts as I find them in Proneomenia, I 
may be allowed to recapitulate the different statements, which the 
several authors, who have hitherto oceupied themselves with Neo- 
menia and Chaetoderma have made about the generative organs, 
"statements often so contradietory and divergent that if we would 
attempt to reconcile them it is indeed necessary first to compare 
them with each other. This is more especially advisable because 
Proneomenia furnishes the material required to bring about such 
a reconciliation and thereby affords another valuable proof of the 
close relationship of the three genera here mentioned. Whereas the 
nervous system, the integument, the rudimentary foot ete., have se- 
verally given evidence in the hands of other authors of the affinity 
alluded to, the generative system has as yet not been examined in 
this light because the isolated facts appeared not to be connected 
by a common link. I will further on attempt to prove that Pro- 
neomenia furnishes us with the elue leading out of this labyrinth. 
Taking the different authors chronologically we find that TuLL- 
BERG gives the following details about the generative system in 
Neomenia carinata. He describes (31, p. 7) the ovary as being 
situated between the upper wall of the stomach and the muscu- 
. lar coat of the body, and divided into compartments by transverse 
membranes of connective tissue. In these compartments he finds 
eggs in different stages of development and small cells between them, 
which are probably of the same character as those from which the 
