28 Memoirs of the Indian Museum. [Vor. VI, 
The Test is rather thick. It is cartilaginous and semi-transparent, allowing the 
internal body to be seen more or less clearly from outside. 
The Mantle is very thin and transparent, with the musculature only very feebly 
developed (Pl. V, fig. 7). Even on the siphons the muscular bands are not strong. 
The Tentacles are simple, filiform, and more than thirty in number. They are 
not all of one size and are not arranged with any regularity. 
The Branchial Sac is well developed and has very numerous internal longitudinal 
bars. The transverse vessels are nearly all of the same size. ‘The meshes are 
much longer antero-posteriorly than transversely and contain mostly only two stig- 
mata each (Pl. V, fig. 9). Very short wart-like papillae are found at the angles of 
the meshes. No intermediate papillae are present. 
The Dorsal Tubercle is horseshoe-shaped, simple, with both horns turned in- 
wards. It is placed in the posterior corner of a triangular peritubercular area just 
in front of the origin of the dorsal lamina. 
The Dorsal Lamina is a simple broad membrane. It has no teeth and no ribs, 
and has the free margin undulated sideways (Pl. V, fig. 8). 
The Alimentary Canal forms a double loop on the left side of the branchial sac 
in the posterior third of the body. There is no sharp boundary between the stomach 
and the intestine and the anal aperture is smooth-edged. 
The Gonads form an oval mass of testicular and ovarial follicles filling up the 
space between the first and second loop of the intestine. The oviduct and the vas 
deferens are separate, both running parallel with the rectum. 
Locality.—Andamans. One specimen. 
This species differs more or less distinctly from all the other known species of 
Ascidia which have about two stigmata in each mesh of the branchial sac. It differs 
from A. diplozoon, Sluiter, A. longisiphoniata, Kiaer, and A. longrsirata, Hartmeyer, 
in having the dorsal lamina plain, and from A. tricuspis, Sluiter, in having the 
branchial papillae rounded and not provided with lateral processes. In the struc- 
ture of the branchial sac this species agrees pretty well with A. reptans, Heller, from 
which, however, it differs markedly in several important characters. Perhaps its 
neatest ally is A. nodosa described by Sluiter from the Bay of Batavia, but in this 
species the tentacles are all of one size, the dorsal lamina is narrow, and the mantle 
is muscular. 
Fam. CLAVELINIDAE. 
This interesting family, characterized by the possession of the faculty of repro- 
duction by budding, is represented in the collection by the following single species. 
Podoclavella fecunda, Sluiter (?). 
(Pl. V, figs. 10-12.) 
Podoclavella fecunda, Sluiter, Die Tunicaten der Siboga-Expedition. IAbt. Die Sozialen und 
Holosomen Ascidien. Siboga-Exped. Bd. LVIa, 1904. 
Locality.—Coral Islands, Andamans. Five specimens. 
It is with much doubt that I refer these specimens to the above named species, 
