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THE HYDROIDS OF THE IRISH COAST. By J. E. DUERDEN, 
A.R.C. Sc. (Lond.) ; Curator of the Museum, Kingston, Jamaica. 
[Read May 20; Received for Publication, May 22; Published Ocroser 10, 1896.] 
Havine left Ireland, I have considered it advisable to summarize 
my results, however incomplete, of the known species of Irish 
Hydroids, upon numerous collections of which I have been 
employed for two or three years. The list also contains the records. 
of those whose occurrence has been noted by other workers in the 
group. The following are the principal publications referring to 
Trish forms :— . 
Dr. A. Hill Hassall, in a ‘Catalogue of Irish Zoophytes,’’ 
and in a “Supplement ’”’ to the Catalogue, made the first attempt 
at a list of the Irish Hydroids (1841a, 18410). 
Mr. William Thompson, in his “ Natural History of Ireland,’ 
gives a number of localities for different species (1856). 
Prof. G. J. Allman has described and referred to, in various 
publications, a number of representatives obtained from Ireland. 
In the “‘ British Hydroid Zoophytes”’ (1868) the Rev.T. Hincks 
summarizes, under each species, the Ivish localities where rarer 
forms are known to occur, being indebted mainly to the lists and 
collections of Prof. Allman, Dr. Hassall, Mr. W. Thompson, 
Prof. Wyville Thomson, and Mr. G. S. Brady. 
“The British Association Guide to the County of Dublin” 
(1878) records about fifty species for this part of the coast, from 
the collections of Mr. M‘Calla, Dr. Hassall, Prof. J. R. Greene, 
Hon. Miss Lawless, Mr. D. St. J. Grant, and Prof. H. W. 
Mackintosh. 
Prof. Haddon, in a “ Preliminary Report on the Fauna of 
Dublin Bay” (1886), adds several species. 
Mr. Kirkpatrick (1889) records the specimens obtained on a 
deep-sea trawling expedition off the south-west of Ireland. 
