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Durrpen—The Hydroids of the Irish Coast. 415 
It was found to be rather abundant creeping over Fucus 
collected along the shore at Roundstone. Prof. Haddon obtained 
the species from Dalkey. 
Cuspidella grandis, Hincks. 
A rare species, found growing on worm-tubes from Bally- 
cotton, at a depth of 30 fathoms (R. D. S8.); Birterbuy Bay, 
Connemara (G. 8S. Brady). 
Cuspidella costata, Hincks. 
On tubes of Tabularia indivisa, Berehaven, 1893. 
Filellum serpens, Hassall. 
Common all around the coast, growing on other zoophytes. 
V. COPPINIIDZ. 
Coppinia arcta, Dalyell. 
Dredged from most localities, growing principally on Sertu- 
laria abvetina. 
VI. HALECIIDZ. 
Halecium halecinum, Linn. 
Common. 
Halecium muricatum, Eil. and Sol. 
Giants’ Causeway (Hassall). 
Halecium Beanii, Johnston. 
Common from all parts. 
Halecium tenellum, Hincks. 
A small colony, growing on Tubularia from the Fairy Bridge, 
Donegal Bay (J. E. D.). 
Halecium plumosum, Hincks. 
Described by Mr. Hincks from an Irish specimen in the collec- 
tions of Trinity College, Dublin. It has apparently not been 
noticed since. 
