REPORT 0'S THE TUNICATA. 
337 
cells, as the matrix is clear and structureless, and the vessels are not sufficiently abundant 
to make any difference. 
The muscle bands in the mantle are chiefly longitudinal, but transverse and oblique 
bands are also present in abundance. The sphincters are well developed, and large 
numbers of fine longitudinal muscle bands radiate from the bases of the two siphons. 
The branchial sac differs from that of Goodsina 'placenta in having no folds. It also 
has the stigmata on the whole rather larger and more regular (see PI. XLIV. fig. 2, sg.). 
Thev are rounder than and not so long as those of Goodsiria coccinea, so that in the 
condition of the branchial sac the present species occupies a position between those 
of Goodsiria placenta and Goodsiria coccinea. The horizontal membranes on the 
transverse vessels are slight (PI. XLIV. fig. 2, tr.). 
The tentacles are rather short and stout, and, unlike those of Goodsiria placenta, they 
are all of the same size. 
The oesophagus is long and narrow. It runs posteriorly and ventrally. The globular 
stomach has well-marked longitudinal folds. A transverse section shows (PI. XLIV. 
fig. 3) that there is one very thick fold {ty.) and twelve slighter ones {fd.). They 
all’ project in for a considerable distance so as to greatly reduce the lumen. They are 
covered with ciliated columnar epithelium {ep.) The outer part of the stomach wall 
at the bases of the folds contains a large number of blood-vessels (PI. XLIV. fig. 3, h.v.). 
The intestine runs anteriorly from the stomach, and then turns dorsally in a wide loop, 
and then anteriorly again to form the short rectum. The whole of the intestinal tract is 
very narrow. 
The reproductive organs are in the form of poly carps imbedded in the mantle and 
projecting into the peribranchial cavity. These are unisexual, as in the case of Synstyela 
incrustans, and only female ones were found. Endocarps are also present attached to the 
mantle. 
Goodsiria coccinea, Cunningham (PI. XLV. figs. 1-19). 
Goodsiria coccinea, Cunningham, Trans. Linn. Soc. Lend., vol. xxvii. p. 489. 
The Colony is massive, and may be of rounded form, or elongated. It is attached by 
the lower end, is not pedunculated, and has the upper end wide and rounded. The 
surface is generally rather uneven, but smooth. The colour (after preservation in alcohol) 
is a pale bluish-grey.^ 
The length is 5 cm., the breadth is 2 cm., the thickness is 1 cm. 
The Ascidiozooids are fairly large and numerous. They are distributed evenly over 
the surface of the colony, and are distinctly visible externally. The anterior end 
'forms an elliptical area, generally 2 or 3 mm. in length, and bearing the conspicuous 
1 Wl:en living, according to Prof. R. 0. Cunningham, it is scarlet. 
(ZOOL. CHALL. EXP. — PAET XXXVIII. — 1886.) 
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