14 Proceedings of the Roi/al Irish Academy. 



L'.D.S. Survey. Station 225. Rosses Bay, 32-35 fathoms. Three speci- 

 mens. 



This sponge, which has been obtained fairly often in recent years off 

 the west and south-west coasts of Ireland, is evidently not as common as 

 Phakelha ventMdbrwm, small cup-shaped specimens of which it resembles 

 superficially. The two species can, with practice, be distinguished without 

 microscopical examination owing to a difference in texture and in the margin 

 of the cup, which is rather thick and rounded in Tragosia, and which is 

 thinned to a rather sharp edge in Phakellia. 



Tragosia polypoides (Schmidt). 



R.D.S. Survey. West coast of Ireland. 



The sponge is branching in one plane, and has a fan-shaped outline. Il 

 is 46 lain, in height by "1 mm. in its greatest breadth. This is the first time 

 the species has been obtained within the Irish area. 



Hymeniacidon caruncula Bowerbank. 



R.D.S. Survey. Blacksod Bay. 



only fragment of this very common species in the collection was 

 preserved owing I vergrown by a gymnoblastic hydroid. 



Order EU< ERATOSA. 



Family Sfongeludab. 



Spongelia fragilis (Montagu). 



R.D.S. Survey. Station. 240, Lough Swill] thorns. 



A specimen "t" this common spe . i m the bark of a crab 



i // at , which is thickly covered with Polyzoa and Hydroida, and 



which has on one leg a growth of // • Dvjard 



LIST OF l:hl Kl.'HNi 1>. 



1. Bowbebamk, .T. S.— A Monograph of the Brit - id te. Vols. 1-3. 



Society, London, " 



2. i.VKTKi:. J. H. — Report on Specimens dredged up from the Gulf of 



iar, ami pn bo the Liverpool Free Museum, by Captain 



W. ELCawne Warren. Ann. Mag. Nat. Bistory (B), v, L880. 

 •".. Heni'Y. A. — Report on the Sponges. / Report on the Pearl Oy- 

 Fisheries ol the Gulf ■•; M SuppL Report, xviii. London, 



1905. 



