3o2 Scientific Proceedings, Royal Dublin Society. 
in the stem. Examination of actual specimens shows, however, 
that only one is given off from the main stem at each bend; 
but this generally gives off another quite close to its origin. 
The abundance and approximation of the branching gives a very 
crowded appearance to the colony. The hydrothece in Thomson’s 
figure are also a little too elongated. 
The species appears capable of existing under two very diffe- 
rent habits. In one case the creeping stolon gives rise only to 
short-ringed pedicels, each bearing a single polypite. When first 
I obtained this form I was under the impression that it was an 
entirely new species. Subsequently, however, I found examples 
creeping, over Crisia in which, besides this simple habit, there 
were springing from the same stolon some in which the pedicels 
became more elongated, and others in which the stems were 
abundantly branched, as in the more common form. 
The gonothece do not seem to be abundant. I have obtained 
them on colonies from Blacksod Bay and from Dursey Island. 
Although the species has been found from localities all round the 
Trish coast, it apparently has not been recorded from other parts 
of the British Isles. 
Habitat.—Very abundant on Zostera, Holywood, Belfast 
Lough (Professor Wyville Thomson): Blacksod Bay (R. D.58.): 
Bantry Bay, on Crista. Dalkey, on other zoophytes. Bundoran, 
Donegal Bay, on Alge. Dursey Island, on Laminaria and Coryne. 
Roundstone, Connemara, on Zostera, (J. H. D.). 
Campanulina panicula, G. O. Sars. 
(Pl. XIV., figs. 7 and 8.) 
Stem erect, branched, straight; slightly annulated at the origin, 
springing from a thread-like stolon forming a complex network 
over other foreign bodies, terminating in a hydrotheca ; branches 
arising alternately, three or four annulations at their origin, smaller 
than the stem, either no further branching, each supporting only 
a single polypite, or divided dichotomously once or twice. Hydro- 
thece very thin, obconic; not sharply marked off from the pedi- 
cels, closed by an operculum formed of numerous long convergent 
segments. Polypites capable of great extension. Gronothece and 
Gonozooid not known. Height, 1 cm. 
