51 
no conical exerescences bordering this opening as they were deseri- 
bed for Neomenia by TULLBERG and as I find them myself in Prof. 
Ray LaAnkEstEr’s sections. Inside the complex of tubes commen- 
eing at the pericardium, down to this exterior opening I have 
found only a few fragments of ova in my preparations: bundles 
of spermatozoa were however of more frequent oceurrence and I do not 
hesitate to regard the tubes as the normal passage along which the 
genital products are conveyed to the exterior. 
And in this light the descriptions by former investigators of the 
genital apparatus ofthe Solenogastres can all be brought to cor- 
respond to the same type. HANnsEN saw ova passing from the ge- 
nital gland into the pericardium of Chaetoderma and has shown 
v. Grarr’s branchial sacs to be identical with his glands, leading 
from the pericardium to the exterior. In Proneomenia I find dist- 
inet ciliated passages from the genital gland into the pericardium and 
similar tubulo-glandular structures bringing about the communication 
between the ova-laden pericardium and the exterior. TULLBERG 
finds ova in the pericardium of Neomenia and in Prof. Ray Lan- 
KESTER’s specimens I find the same and moreover again a glan- 
dular passage leading from the pericardium to the exterior }). 
So the typical genital apparatus for the Solenogastres may be 
thus characterized: the genital gland (either unisexual or herm- 
aphrodite) is double and communicates with the pericardium. From 
the pericardium a complex of ciliated and glandular ducts leads to- 
'wards the exterior and opens out in the immediate vicinity of the 
anus. 
This is the result of direct observation. A theoretical question of 
the highest morphological importance is this: may the portion of 
these conducting tubes situated posteriorly to the museular constrietion 
me (fig. 46, RR’) be considered as representing the kidney? The nature 
of its secretion must in the first place be consulted in answering 
1) Kowalewsky’s account (18), which is very short, can for the present 
not be sufficiently compared to those above cited, until more eircumstantial 
description or figures are available, 
