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SOME NORTH OF IRELAND POEYZOA. 



BY WILLIAM SWANSTON, F.G.S., AND J. E. DUERDEN, 

 A.R.C.SC. (lOND.) 



In the summer of 1876 and 1877, W. Swanston and some 

 friends had a few days' dredging off the entrance of Belfast 

 lough, from Earne on the north to Donaghadee on the south, 

 in depths varying from twenty to seventj^-two fathoms. The 

 Polyzoa obtained, which were chiefly on stones and dead 

 shells, were sent, at the close of the dredging operations, to 

 Dr. Thomas Hincks, F.R.S., who kindly named them, and 

 duly returned the specimens, accompanied by a list of the 

 species occurring. As this list, which has never been pub- 

 lished, contains some very rare species, and gives additional 

 stations for others which are less rare, it is thought desirable 

 that it should be made public. 



For the determinations alone Dr. Hincks is responsible ; 

 the notes on Irish distribution are the work of J. E- Duerden. 

 Where the names in Dr. Hincks' original list are different 

 from those now adopted, the former are printed in brackets 

 after the modern appellation. The lists which follow contain 

 forty-six species, four of which have not been previously re- 

 corded from the Irish coast. 



T^vENTY Fathoms, off Bi,ackhead. 



Bug:ula avicularia, Linn. — Not previously recorded from Ireland. 



Cellcpora (?) tubigcra.— Busk. 



Flustra sccurifrons, Pall. — {K tnmcata, Linn.)— Found also from 



Dublin and Belfast bays. 

 Tubulipora flabellaris, Fab. — {T. pJialangea, Conch.) — Mentioned 



for the first time from Ireland. 

 Idmonea serpens, Linn. — [Tubulipora serpens^ Linn.) — Very common, 



and generally distributed. 



TweNTY-Two Fathoms, off Entrance to Larne Harbour. 



Wlicroporella ciliata, Pall. — {Lepralia ciliata, Pall.) — Very generally 



distributed. 

 Chorizopora torongniartiij And. — {Lepralia brongniariii, Aud.) — Also 



recorded from Dublin and Birterbuy bays, 

 Mucronella ventricosa, Flass. — {Lepralia ventricosa, Flass.) — Common, 



From Dublin and Belfast bays. 

 Schizoporella vulgaris, Moll. — {Lepralia vulgaris^ Moll.) — Previously 



obtained from Birterbuy bay and Antrim coast. 

 iVIembranipora pilosa, var. dentata. Pall. 

 Wl. dumerilii, Aud. — Common on the Irish coasts, recorded by Hj-nd- 



man from Antrim. 



