Í 
| 
of Simple Ascidians. 359 
mens of it which were obtained by Mr. A. G. More, in 1869, 
in Kilkieran Bay, Connemara. 
A, mollis is a well-marked species, and is not likely to be 
confounded with any known form. It can always be distin- 
guished by the soft though firm and shining test, which, on 
close inspection, is observed to be marked all over with minute 
crimson punctures (the terminal extremities of the blood- 
channels, which in it are more inflated and globular than in 
any other species). 
Ascidia crassa, Hancock. 
. Body broadly oval, a little depressed, Pd and irregularly 
wrinkled, of a pale flesh-colour, adhering by various parts to 
sea-weeds. Apertures distant, sessile; branchial one subter- 
minal; anal about halfway down the side. Test very thick, 
hard, cartilaginous, pellucid, irregularly and strongly wrinkled, 
of a pale flesh-colour. Mantle of a rose-colour, deepened to- 
wards the margins and over the alimentary canal; the tubes 
short, particularly the branchial one, which is subterminal ; 
the anal is a little produced and doubled over towards the left 
side, Tentacular filaments numerous, well-developed, unequal 
in size. Branchial sac minutely plicated, with obtuse papille, 
alternately large and small; the stomata very small and m 
tical. Ventral plait delicately ribbed transversely, and minutely 
pectinated; by the side of the mouth the pectinations are in- 
creased in size, and replace the lamine. Length 2} inches, 
h. 
Ascidia inornata, Hancock. 
Body elongated, oval, depressed, attached by the whole side, 
of a dim e rn-colour. | Apert a little produced, with 
longitudinal ridges or folds; branchial one subterminal; anal 
abo y down, Test rather thin, cartilaginous, trans- 
parent, with a few minute papille and some scattered agglu- 
