KEPORT ON THE TUNICATA. 
335 
The reproductive organs form large masses attached to the inner surface of the mantle 
and projecting into the peribranchial cavity. These polycarps are larger than those of 
Goodsiria placenta, but are similar in other respects. 
Several very large tailed larvae vere found in the peribranchial cavity of one of the 
Ascidiozooids examined. 
The examination of further specimens of this form may possibly show that it ought to 
be regarded as a distinct species from Goodsina placenta, but I am inclined to expect 
that intermediate forms will be found showing that both are members of a single variable 
O O 
species. 
Goodsina peduncidata, n. sp. (PI. XLIV. figs. 1-3). 
The Colony has the form of a rounded or pyriform mass supported on a peduncle. 
The upper end is vdde and convex. The surface is uneven and not smooth. The colour 
is light grey. 
The length is 4 '5 cm., the breadth is nearly 3 cm., and the thickness is about 2 ‘5 cm. 
The Ascidiozooids are large and fairly numerous. They are distributed evenly over 
the surface of the colony. Their anterior ends show as rounded or elliptical areas of a 
slightly darker colour, usually from 2 mm. to 3 mm. in length. Each is provided with 
two apertures, which are prominent and conspicuous. The bodies of the Ascidiozooids 
are slightly elongated antero-posteriorly, ljut are not divided into regions. 
Tlte Test is firm and cartilaginous, and the outer layer is rather tougher than the rest. 
The internal part is white in sections, and is rather opaque. The matrix is apparently 
structureless, but test cells are abundant. Tliere are no bladder cells. The test cells are 
not large ; they are mostly of rounded and fusiform shapes, and are generally pigmented, 
of a yellowish-brown colour. Vessels are not numerous in the test. 
The Mantle is moderately strong, and the musculature is well developed. The 
muscle bands run in all directions. 
The Branchial Sac is large and rather delicate. No folds are present, but the 
internal longitudinal bars are well developed. They are regularly arranged and have no 
papillae. The transverse vessels are moderately wide, and are all of about the same size. 
The stigmata are elliptical in shape and are of fair size. They are arranged with great 
regularity. The meshes are slightly elongated transversely, and each contains three 
stigmata. 
The Endostyle is large and conspicuous. Its course is straight. 
The Dorsal Lamina is a plain membrane. 
The Tentacles are numerous, and are all of the same size. 
The Alimentary Canal lies alongside the branchial sac. The stomach is globular 
and has its wall folded. The intestine is rather narrow. 
