1915.] A. OKA: The Tunicata of the Indian Museum. 5 
The Gonads are paired; that on the left side is placed anteriorly to the intesti- 
nal loop, close to the place of bending of the latter, while the other one is situated 
in the centre of the right side ; both are attached to the inner surface of the mantle. 
They are roundish oval in shape, with the peripheral part divided into a number of 
small lobes. The ducts of the genital glands, as well as the renal organ, could not be 
satisfactorily made out. 
Locality.—Station 277, 5° 48’ 15” N., 80° 56’ E.; depth 859-880 fathoms; bot- 
tom green mud and sand ; January roth, 1901. ‘Three specimens. 
This interesting little species looks externally very much like Eugyra. The large 
infundibula arranged regularly in longitudinal and transverse rows and showing clear- 
ly through the transparent test strongly reminds one of those of Eugyra, so that at first 
glance one is greatly tempted to refer the animal to that genus. On cutting it open, 
however, it becomes at once cléar that we have here, not Eugyra, but a member of 
the genus Molgula, which is characterized by the branchial sac being disposed in well 
marked folds. There are, indeed, some species of Molgula already known, such as 
M. eugyroides, Traustedt (16) from the West Indies and the two species, M. sordida 
and M. crimita, Sluiter (13) from the Malay Archipelago, which have the branchial sac 
with large infundibula arranged regularly like that of Eugyra, but the present species is 
quite distinct from all of them. It differs from M. eugyroides, whose ‘‘ gjellesaekken 
minder i en paafaldend Grad om Eugyra-Slaegtens ”, in having seven folds instead 
of six upon each side of the branchial sac, and also in having eight to ten internal 
longitudinal bars on each fold instead of three or four. The other two species, which 
have both seven folds on each side, can readily be distinguished from the present 
species by the unusual number of the lobes at the branchial and atrial apertures, 
M. sordida having seven lobes at the branchial and none at the atrial, while M. crimita 
has both apertures four-lobed. 
Of the three specimens one was tolerably well preserved, though somewhat con- 
tracted ; and the above description refers mainly to this specimen. The remaining 
two had the whole internal body so strongly contracted that it was impossible to 
study the internal anatomy satisfactorily. 
Molgula birmanica, n. sp. 
(Pl. I, figs. r—2; pl. II, figs. 3—7.) 
External Appearance.—The body is roughly speaking egg-shaped, with the longer 
axis directed dorso-ventrally. The anterior surface is usually sunk in, so as to form 
a shallow elliptical depression, at the bottom of which the short siphons are placed 
(PL I, fig. 1). The posterior end is broad and rounded. The dorsal and ventral 
edges are both strongly convex, but the ventral is more so than the dorsal, the for- 
mer corresponding with the pointed end of the egg. The animal is not attached, 
lying at the bottom either singly or gathered into groups of several individuals. 
The apertures are borne on short siphons, and are not distant. The siphons 
form knob-like prominences and are distinctly visible even when they are fully 
