ASCIDIOIDA. 
467 
new species. It forms snowy white circular patches of various size (but 
generally about 3 lines in diameter) on Zostera marina , in Strangford 
Lough, where I first obtained it in January, 1835. 
T. bellis may be likened to the central portion (omitting the raised 
marginal tubes) of Tub. patina of the British Zoophytes set within a broad 
white circular rim, which is perfectly flat, instead of being raised or 
saucer-like. 
T. hispida, Flem. 
Not uncommon on marine plants and shells in the North and South. 
Down and Antrim coasts, on shells, Zoophytes, and stones ; but chiefly on 
Algae such as the Delesserice and Nitophyllce, occasionally even on the 
filiform Griffithsia setacea. On a plant of this species I have an interest- 
ing specimen, in which, as if for want of room to fully expand itself, the 
polypidom assumes .the form of a double circle, and the marginal base 
folds in, so that taken altogether we have somewhat the appearance of 
the scroll or volute of an Ionic pillar, the lines thus marking the 
form which the margin assumes. On (^T/o) Cellepora cervicornis from 
the Nymph Bank, in Miss Ball’s col- lection. On various species 
of Algm in my Herbarium, from Van Diemen’s Land, W. T. I possess 
ova of dog-fish ( S . canicula ) with fish not excluded, having a full-grown 
T. hispida on it. 
T. serpens, Linn. 
Common around the coast of Ireland, adherent to flexible Zoophytes 
(Sertularia abietina being a favourite), shells (especially within old bi- 
valves), stones, and Algse (even on the filiform species, as Griffithsia setacea, 
&c.), W. T. After an examination of very numerous examples of this 
species on the variety of bases just mentioned, I feel satisfied that the 
objects figured in the Annals of Nat. Hist., vol. vi. pi. 6, figs. 3 and 4, as 
Tub. verrucaria, and in the same work, vol. vii. pi. 10, figs. 1 and 2, under 
the name of Tub. lobulata, are merely T. serpens. T. lobulata, with its 
six arms or expansions, should, I conceive, be regarded simply as a very 
aged individual which had lived long enough to describe a circle with its 
arms. Specimens are before me with one, two, three, and four expansions 
of a similar nature in all respects to the six of T. lobulata. 
By reference to Mr. Templeton’s specimens, I find that his Plierusa 
tubulosa (Mag. Nat. Hist., ix. p. 469) is the Tubulipora serpens, Flem. (T. 
transversa, Lam.) — This species, it will be recollected, was the Millepora 
tubulosa of Ellis and Solander. 
T. obelia , Johnst., 
Obtained with the specimens from Kinsale, have been noticed by Dr. 
J. E. Gray, but the species being considered rare, a second and northern 
habitat is given. 
On Pinna from the coast of Cork. Pectunculus pilosus from Magilligan, 
Co. Londonderry, W. T. 
T.ffiabellaris, W. Thompson. 
The delicate, smooth, and somewhat hyaline specimens which I obtained 
on the beach at Bangor, Co. Down, in 1833, and subsequently dredged in 
the Loughs of Strangford and Belfast, are regarded by me as identical in 
species with the large greyish- white rugose form (in some specimens the 
tubes are even ridged across) procured on the open coast of Down, at 
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