on the Natural Group of Tunicata. 551 
the granulated liver, of which the curved commencement 
is seen opposite to a small mass of the left ovary, which, 
in cutting the envelope, has been left adhering to the 
. mantle just under the anal orifice. ‘The rest of the left 
ovary may be seen behind the ascending stomach, adher- 
ing to a fragment of the mantle, of which the muscular 
transverse fibres are very visible. Some of these fibres 
are also seen traversing the intestine and right ovary, 
keeping these parts as it were in situ. Between the in- 
testine and the branchial orifice (which is marked on the 
inside by a circle of plumose tentacula) may be distin- 
guished the folds of the reticulated branchial pouch. The 
- anal orifice is internally somewhat elevated and qua- 
Fig. 4. 
drifid. 
. Boltenia reniformis magnified, and the parts seen as in 
the former figure, except that the right ovary is separated 
from the intestine, and put aside with the stomach, so as 
to show the beautifully granulated lobes of the liver, 
which appear to be most voluminous towards the pylorus. 
The singular cubical lobes of the right ovary become also 
visible in this view of the several parts. 
Outline of Boltenia reniformis magnified as before. The 
intestine and right ovary being removed from their place, 
in order to show the position of the other parts more 
distinctly. 
A. Anal orifice. 
B. Branchial pouch. 
C. Branchial orifice. ! 
T. Circle of tentacular filaments, Mich surround 
in a pulpy irregular form the inner part of 
the branchial orifice. 
D. Dorsal sulcus. | 
E. Frag- 
