35 
Lamina dorsalis is a plain membrane. The dorsal tub- 
ercle is a lying S or it is C-shaped with its narrow aperture 
turned to the right. The tentacles are present in a number of 
about 16; they are branched, but only branches of lst order ap- 
parently occur. 
The alimentary canal is strongly curved. The two parts 
are lying close to each other except near the bending. 
Anus has a plain margin. 
A gon ad is found on each side of the body. On the right 
side it is situated just above the excretory capsule. The left one 
is placed above the intestinal loop. The right gonad has a higher 
position than the left. 
The gonads are shaped as circular, somewhat concave discs. 
Their upper parts, consisting of eggs, are inclosed in the lower 
testicular parts, which have a radiating structure. The female aper¬ 
ture may be seen near the upper edge of the ovarial part. The 
male duets are apparently not yet developed. 
The excretory capsule is placed horizontally, and its upper 
edge is almost a straight line, which may be characteristic. 
Gonads of this structure are known from other Molgulids. 
Sluiter (1914) writes about M. enodis : „les testicules entourant 
l’ovaire en forme de demi-lune“. 
The present species appears to be most nearly related to M . 
tumulus Q. & G., which has the testes in a similar position: „la 
partie måle est constituée par des follicules rayonnants-“. 
(Pizon 1898, p. 371). Also in the structure of gill-sac and dorsal 
tubercle they have features in common. It is, however, easily dis- 
3* 
