416 Scientific Proceedings, Royal Dublin Society. 
VII. SERTULARIIDZ. 
Sertularella polyzonias, Linn. 
Found in abundance all round the coasts. 
Sertularella Gayi, Lamouroux. 
Birterbuy Bay, Connemara (G. 8. Brady) ; Dublin Bay. 
Sertularia rugosa, Linn. 
South-west of Galley Head (1893); Bundoran, Donegal Bay 
{J. EK. D.). 
Diphasia rosacea, Linn. 
Plentiful at most stations. 
Diphasia attenuata, Hincks. 
Dublin Bay (1886) ; south-west of Galley Head (1898). 
Diphasia fallax, Johnston. 
South-west of Galley Head, from a depth of 48 fathoms (1893). 
Diphasia pinaster, Ell. and Sol. 
Belfast Bay (Hyndman) ; Dublin Bay (W. Thompson) ; 
Giants’ Causeway (Hassall). 
Diphasia tamarisca, Linn. 
South-west of Galley Head (1893) ; rare in Dublin Bay 
(Hassall). 
Diphasia alata, Hincks. 
South-west of Galley Head (18938). 
Sertularia pumila, Linn. 
Abundant everywhere. 
Sertularia gracilis, Hassall. 
Birterbuy Bay; Blacksod Bay; Casheen Bay, growing on 
Fucus (R.D.8.) ; Cork Harbour (Haddon); Laytown (1894 a). 
Sertularia operculata, Linn. 
Very plentiful, especially on Laminaria washed ashore. 
