410 Records of the Indian Museum. [Vor Vit, 
(ec) The short connective, so short as to be almost non- 
existent, to the supra-intestinal ganglion (pl. xxxii, 
fig, Zl. op ude Gde) 
This ganglion is similarly near the cerebropleural mass in the 
Volutids examined by Woodward, in Voluta (Cymbiola) ancilla 
(Sol.), Neptuneopsis gtlchrists (Sby.), and Volutolithes abyssicola (Ad 
and Rve). Pace examined Voluta musica and found that this form 
has the supra-intestinal ganglion separated from the cerebropleural 
mass by a considerable length of visceral connective. Bouvier’s 
type was Voluta neptunmt, Gmelin, which is referred by Pace and 
Woodward to the section ‘“‘ Melo,” but is grouped by Pilsbry- 
Tryon with Cymbium; he found the connective between the 
pleural and the supra-intestinal ganglion long. This seems to 
indicate that the type now under discussion, Melo indicus, Gmelin, 
can hardly be in the same section of ‘‘ Voluta”’ as Bouvier’s species. 
The supra-intestinal ganglion gives rise to three chief trunks, 
not so many as in Bouvier’s type which had eight to ten nerves 
arising here. The two anterior trunks branch and supply the body- 
wall and the ctenidium and osphradium. ‘There seems to be an 
anastomosis between one branch nerve to the body-wall and siphon 
from this ganglion and a nerve from the left pleural ganglion. 
The third of the trunks is the visceral loop (V.L. sp.). 
The sub-intestinal ganglion is, as usual, close to the pleural, 
but is more closely bound up with the right pleural than in 
Bouvier’s type, the zygoneurous connection (Zy.) being very short 
and thick. The zygoneurous connection, it will be remembered, is 
formed by a great parietal nerve of the right-side passing through 
the subintestinal ganglion. The subintestinal ganglion therefore 
appears to give off this parietal nerve (R. par.) and also the vis- 
ceral loop. 
The visceral loop is quite normal, with two ganglia (v and v!) 
at the back, the supplementary ganglion being to the left of the 
principal one. From the supra-intestinal part (V.I. sp.) of the 
commissure, near the point when it passes over the oesophagus, a 
nerve seems to branch off to the branchial region. The supple- 
mentary ganglion is situated on the loop just after it has crossed 
the intestine, and from it a nerve runs up towards the heart and 
visceral mass. The principal ganglion is a short distance to the 
right and it gives off various nerves including one to the heart, etc. 
and one to the rectum and neighbouring parts. 
The buccal ganglia are close below the cerebrals and are 
connected by a commissure. The pedal ganglia are connected 
closely with the cerebropleural mass and with one another and give 
off numerous nerves which I have not further studied. 
V.—CIRCULATORY SYSTEM. 
The heart is slung in the pericardial cavity (pls. xxix & xxxi, 
figs. 3 and 8) by the connection of the efferent ctenidial vein with 
