Duerpen—TZhe Hydroids of the Irish Coast. 417 
Sertularia filicula, Ell. and Sol. 
Trish coasts (W. Thompson). 
Sertularia abietina, Linn. 
Obtained from most dredgings, with numerous other zoophytes 
growing parasitically. 
Sertularia cupressina, and var. argentea, Linn. 
Dredged from most localities. Colonies of this species, suffi- 
cient to fill several large jars, were obtained from Lough Swilly 
by the Royal Dublin Society’s Survey, with numerous other 
zoophytes upon them. 
Hydrallmania faleata, Linn. 
Trawled and washed ashore in great abundance. 
Thuiaria thuja, Linn. 
A rare Irish form. Recorded in the Dublin Bay list. 
Thuiaria articulata, Pallas. 
Dublin Bay (Ellis) ; north of Ireland (W. Thompson). 
VIII. PLUMULARIIDZE. 
Antennularia antennina, Linn. 
Dredged from numerous localities. 
Antennularia ramosa, Lamarck. 
Generally distributed. 
Aglaophenia pluma, Linn. 
Known from different spots all round the coast. 
Aglaophenia tubulifera, Hincks. 
Small portions attached to the body and limbs of Stenorhynchus, 
Blacksod Bay (R. D.8.). 
