46 Nils Hj. Odhner. 
cular muscles, (7) epithelium, (8) cuticula. Thus the cone in 
question is composed in the same way as the pharyngeal tube 
of a Turbellarian (cf. WILHELM 1912, fig. 32), an agreement to 
which I attribute more than an accidental import. In addition 
to the facts mentioned it may be remarked that a similar proboscis 
is present in Drepanomenia vampyrella HEATH 1911 (p. 79, pl. 7, 
fig. 4); here, too, the openings of the ventral salivary glands ,,are 
very close to the end of the proboscis“ and no radula exists, 
just as in Nematomenia banyulensis. These circumstances, com- 
pared with the conditions prevailing in other Solenogastres, show 
that the pharyngeal region is subjected to an extensive variation, 
a matter to which I shall revert in the sequel. 
With regard to the intestine it deserves to be noticed, as 
THIELE also has observed, that there exist no lateral diverticula, 
so characteristic of the Solenogastres in general. The outline of: 
the intestine is quite even as is evident from both horizontal and 
transverse sections. Its upper wall is thinner than the others 
and furnished with a median stripe of thicker epithelium (fig. 74), 
as described by Pruvor (cf. the transverse section), the lower one 
is thickest and the cells here have smaller nuclei. Owing to the 
elevated shape of the body the intestine occupies a position dif- 
fering from the normal in being rather remote from the ventral 
surface and appearing just above the weak transversal muscles 
(fig. 74). This position and the weakness of the muscles men- 
tioned is certainly in correlation with the unsegmented habitus 
of the intestine, as under these circumstances the respective organs 
do not affect one other mutually in the same degree as usually. 
In the gonads only a very weak median septum was 
present, on each side of which the ova were developed, each 
composed of a single cell which increases in size till, when perfect, 
it detaches itself from the septum and falls into the efferent canal; 
the eggs are covered with a thin cellular membrane. In the anterior 
as well as in the rearmost part of the gonads the septum was 
observed to be absorbed at some points, where the lumen thus 
was unpaired. Whether this is a normal phenomenon of sexual 
maturity in this species, or was occasional, is a question which 
remains to decide. In any case it is a noteworthy fact that both 
the gonads had fused here and there and that this fusion 
was not referable to any rupture of the septum, which, in such 
places, was totally absent. The spermatids, as usual, are formed 
