18 Memoirs of the Indian Museum. [Vor. VI, 
schema I, 3,2,3,1... There are about seventeen tentacles of the first order. The 
dorsal tubercle is of the usual form and not broken up in a number of small openings 
as in Sluiter’s specimens. The branchial sac is dark brown and has four large folds 
on each side, but there are ten to twelve internal longitudinal bars upon a fold and 
four or five in the interspace, while in the original description the number of 
longitudinal bars in the interspace is given as about eight. The transverse vessels 
are of two sizes, there being three smaller ones between each pair of the larger. 
These are, however, all points of minor importance subject to individua! variation 
and do not affect in any degree the identification of this exceedingly well charac- 
terized species. | 
The specimens from the Madras coast are about 50 mm. long and 35 mm. broad, 
and much compressed laterally; at the posterior end the test is provided with a 
number of branched root-like processes for attachment. The specimen from Station 
384 is somewhat smaller and is of a lighter brown colour. 
Polycarpa glebosa, Sluiter. 
Styela glebosa, Sluiter, Die Tunicaten der Siboga-Expedition. IAbt. Die Sozialen und Holosomen 
Ascidien. Siboga-Exped. Bd. LVIa, 1904. 
Locality.—Andamans. One specimen. 
It is with much hesitation that I refer this specimen to Sluiter's species from 
Pulu Sebangkatan, Borneo Bank. As will be seen below, there are many points in 
internal structure in which it does not quite agree with the description of Styela 
glebosa, but as the points in which they agree appear to outweigh the differences 
I have thought it better to regard, at least temporarily, the two forms as identical, 
rather than to increase the number of species of this already bulky genus on the 
strength of a single doubtful specimen. 
The body is erect, oval in shape, 27 mm. in length and 18 mm. in breadth, and 
is not compressed laterally. The branchial aperture is at the anterior end, and the 
atrial is about one-third of the way down the dorsal edge; they are both cross slit, 
inconspicuous, there being no prominent siphons. The surface is irregularly creased 
all over, and is of a pale greyish yellow colour, with reddish brown patches on both 
sides of the dorsal half. There are some branched root-like processes of the test, 
especially along the ventral edge and on the ventral half of the left side, to which 
foraminiferan shells and fragments of algae are found adhering. 
The test is not thick, but tough and leathery; it is white on the inside and in 
section. The mantle is rather thick, soft and gelatinous, with the musculature only 
feebly developed. The siphons are very slight even in the mantle. 
The tentacles are simple, filiform; there are eight larger and eight smaller, 
placed alternately, with some quite small intermediate ones here and there. 
The branchial sac has four very narrow folds on each side; the most dorsally 
situated pair is very slight. The fold has about ten internal longitudinal bars and 
there are two to three in each interspace. The transverse vessels are of three sizes 
