318 PROFESSOR W. A. HERDMAN ON THE 
material is from Port William, Station 349, Falkland Islands, February 6 to 8, 1903, 
6 fathoms. The large colony measures about 14 cm. by 3 em., and is attached along 
the length of a Laminaria-like Alga. The test is dark greyish brown, and the small 
yellow Ascidiozooids show all over the surface as closely placed dots or streaks of a 
lighter colour. In further details this specimen agrees well with the description of the 
Australian one. One zooid was, however, noticed with an eight-lobed branchial aperture. 
The stomach has longitudinal folds. The stigmata are large. The dark colour of the 
test is due to dense crowding with small test-cells. The Scotea colony was evidently 
taken at the reproductive season, as it contains abundance of embryos in various stages 
of development up to the tailed-larval stage ready to be set free. 
Amaroucium sp. (2). 
Some small colonies, a few millimetres to about 1 centimetre across, which were found — 
attached to groups of Styela paessleri and other Ascidians from the Falkland Islands, 
belong to the genus Amaroucium, but may be only young colonies of some larger form 
such as A. distomoides, or A. pallidulum obtained by the Challenger Expedition at 
Port William. 
It may be remarked in regard to the three last species of Compound Ascidians that 
they require re-examination in the living state. Many of the Compound Ascidians 
are scarcely determinable from the contracted and bleached specimens in preserved 
collections. It may well be that one or other of the above Polyclinids had in 
the living state a bright colour or some other characteristic appearance that is now 
wholly lost. 
THALIACEA. 
(MS. received March 13, 1912.) 
Family Sapir”. 
The very large collections of Thaliacea, which were obtained at the South Orkneys — 
and other Antarctic localities (some from under the ice), were found on examination 
to belong entirely to the genus Salpa and to represent two species only ; and in facet 
all the specimens, except a single one, are different conditions and sizes of the common 
and widely distributed species, Salpa runcinata-fusiformis. 
Salpa runcinata-fusiformis, Chamisso-Cuvier. 
Station 432, surface, March 30, 1904; temp. 31°8°. Nearly one hundred specimens, — 
from 3 em. to 6 em. in length, all of the aggregated form, and many of the larger 
ones showing echinated ridges on the test. Most of them showed embryos projecting 
into the peri-branchial cavity, one in each. 
Station 427, from coarse tow-net, March 26, 1904. About one hundred specimens, — 
from 3 cm. to 5 em. in length. In other respects they resemble those from the last 
