406 Scientific Proceedings, Royal Dublin Society. 
Prof. Herdman, during the cruise of S. Y. “ Argo” round the 
west coast of Ireland (1889), obtained fourteen species of Hydroids. 
My own results are founded upon the material collected by the 
different Fishery Surveys of the West Coast, undertaken by the 
Royal Irish Academy (1893) and the Royal Dublin Society 
(1895) ; also upon collections made on expeditions in connection 
with the “‘ Royal Irish Academy Fauna and Flora Committee” 
to the Bantry Bay district and to Donegal Bay, and upon various 
collecting trips on the east coast (1894 a, 1894). Some of these 
results have already been embodied elsewhere. In all, my exami- 
nations make an addition of about twenty-three to the Irish 
Hydroids, including two new species and one new to Britain. 
The present list contains 101 species—35 Athecata and 66 
Thecata. The west coast is much richer in the former group 
than is the east coast, yielding many of the minuter species.’ 
Order.—HYDROIDA. 
Sub-Order.—I. Aruxcara. 
I. CLAVIDZ. 
Clava multicornis, Forskal. 
Obtained growing profusely on the limbs and carapace of 
Inachus, from Lough Swilly ; on Stenorhynchus, from Killybegs ; 
Ballinskelligs Bay, at a depth of 55 fathoms (R. D.S.) ; Dursey 
Sound; Kenmare River; Berehaven; abundant on Fucus, from 
Roundstone ; Donegal Bay rock-pools (J. H. D.). 
Clava squamata, Miller. 
Recorded in the British Association List for county Dublin 
(1878). 
Tubiclava lucerna, Allman. 
Obtained by Prof. Allman on stones between tide-marks in 
Dublin Bay (1863). It does not appear to have since been found 
on the Irish coasts. 
— 
1 Since this Paper was written, Mr. F. W. Gamble has published (Lrish Naturalist, 
May, 1896) “‘ Notes on a Zoological Expedition to Valentia, Co. Kerry,’’ in which he 
records several Hydroids obtained. 
, 
