4 M emoivs of the Indian Museum. [Vor. VI, 
with gelatinous connective tissue. The muscular bands either radiate from the bases 
of the branchial and atrial siphons, or run parallel with their lower edges, so that 
they generally cross one another at right angles and form a more or less regular net- 
work with large rectangular meshes. Posteriorly the work is more irregular. The 
siphons are short, but the sphincters are tolerably well developed. 
The Tentacles are much branched and not numerous. There are about seven 
large ones and, alternating with these, about the same number of much smaller ones. 
In the interspaces between these branched tentacles a number of minute, unbranched, 
almost papilla-like, rudimentary tentacles are found, arranged in a row. ‘The mode 
of branching of the larger tentacles is rather irregular and the terminal twigs end 
bluntly, as is usual in other Molgulids (Pl. II, fig. 2). 
The Branchial Sac is tolerably well developed and has seven distinct folds upon 
each side; those next the endostyle are rather slighter than the others. These folds, 
however, do not inclüde the stigmatic part of the branchial sac, but are formed en- 
tirely of a number of internal longitudinal bars united by short transverse vessels, and 
thus form an open network with rectangular meshes. Usually eight to ten inter- 
nal longitudinal bars form a fold, while there is none in the space between two folds. 
Narrow horizontal membranes are seen running transversely from fold to fold at the 
same levels as the transverse vessels. The stigmata form large flat infundibula ar- 
ranged regularly in longitudinal and transverse rows, each infundibulum being com- 
posed of a single spiral with six to eight turns. The longitudinal rows of infundibula 
coincide in position with the folds in the interior of the branchial sac, but as the in- 
fundibula are extremely shallow, they hardly project into the folds. The boundary 
lines between the transverse rows of infundibula correspond in position with the 
transverse vessels on the folds. The arrangement of the infundibula is therefore much 
the same as that found in the genus Eugyra. The peripharyngeal ridge is conspicu- 
ous by being strongly undulated. 
The Dorsal Tubercle is very simple, the opening being a short straight slit with 
slightly raised lips, situated longitudinally in the centre of a rather small perituber- 
cular area. 
The Dorsal Lamina is a plain broad membrane with no ribs and no teeth. 
The Alimentary Canal forms a long narrow loop upon the left side. The oesopha- 
geal aperture is situated rather backward in the branchial sac, near the dorsal edge 
of the body. The oesophagus is short, narrow, and cylindrical, and opens into the 
wider end of the small pyriform stomach. There are no hepatic folds, and the pos- 
terior end of the stomach is not sharply bounded from the intestine. The intestine 
runs posteriorly and ventrally for some distance, then turns round abruptly, and re- 
turns closely pressed against the anterior wall of its first part, so that no open loop 
is formed, and finally runs anteriorly along the dorsal edge of the branchial sac past 
the oesophageal aperture and opens just opposite the lower edge of the atrial siphon. 
The anal opening is entire and smooth. ‘The greater part of the alimentary canal is 
firmly attached to the inner surface of the mantle and is clearly visible from the 
external surface. 
