ASCIDIOIDA. 467 



new species. It forms snowy white circular patches of various size (but 

 generally about 3 lines in diameter) on Zosfera 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. 



2\ Jiisjnda, 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 Delesserics and NitopliyUce, occasionally even on the 

 filiform Grijfithsia 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 (3"Y^~^) Cellejjora cervicornis from 

 the Nymph Bank, in Miss Ball's col- lection. On various species 



of Algaj in my Herbarium, from Van Diemen's Land, W. T. I jiossess 

 ova of dog-fish {S. canicula) with fish not excluded, having a fuU-gi-own 

 T. hispida on it. 



2\ serpens, Linn. 



Common ai'ound the coast of Ireland, adherent to flexible Zoophytes 

 {Sertularia ahietina being a favourite), shells (especially within old bi- 

 valves), stones, and Alga> (even on the filiform species, as Grijfithsia 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. verrncaria, and in the same work, vol. vii. pi. 10, figs. 1 and 2, under 

 the name of Tub. lobulata, are merely T. serj)ens. 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 Pherusa 

 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. Pectunculns pilosus from Magilligan, 

 Co. Londonderry, W. T. 



T.Jiahellaris, W. Thompson. 

 The delicate, smooth, and somewhat hyaline specimens which I obtained 

 on the beach at Bangor, Co. Down, in 1S33, and subsequently dredged in 

 the Loughs of Strangford and Belfast, arc regarded by me as identical in 

 species with the large greyish-white rugose form (in some s})ecimens the 

 tubes are even ridged across) procured on the open coast of Down, at 



2 H 2 



