372 Mr. A. H. Hassall's Catalogue of Irish Zoophytes. 



land ; and the relation is particularly obvious in the distribu- 

 tion of zoophytes, three species of which, common in the 

 North of England and on the Scottish shore, being also pre- 

 sent on it, and not, I believe, found upon any other part of 

 the coast of Ireland. Thus Thoa muricata (never before re- 

 corded as Irish), Sertularia filicula and Ftustra truncata, all 

 more or less extensively distributed upon the English and 

 Scotch coasts, are occasionally tuet with on the Antrim coast, 

 in the neighbourhood of that Avonder of the world, the Giant's 

 Causeway. Ireland, therefore, it may fairly be inferred, is 

 indebted to Scotland for the presence of at least three species 

 of zoophytes, and probably for some others. I think I may 

 venture to predict that Thuiaria thuja will eventually be 

 found on the coast of Antrim. I now find that only one 

 species of Plumularia is wanting in the Bay of Dublin, and 

 that is P. penaatula. 



To the title of my Catalogue an objection has been raised 

 by Mr. Thompson of Belfast, on the ground that it does not 

 embrace the whole coast of Ireland, but is confined to a par- 

 ticular portion of it. The justice of this observation, as ori- 

 ginally applied to that portion of the Catalogue which has 

 already been pvdjiished, I willingly admit. It should rather 

 have been entitled a * Catalogue of the Zoophytes of Dublin 

 and its vicinity ;' this title, hov.ever, would not be equally 

 applicable to the continuation of the Catalogue, as to some 

 species I have given a second locality. 



I wish it to be distinctly understood, that the Catalogue 

 which has been already published, as well as this Supplement, 

 contain only the results of my own personal observation and 

 research. I have, therefore, not deemed it necessary to ad- 

 vert to the writings of other Irish naturalists on this branch 

 of natural history, not having had occasion to refer to them. 

 I may, however, mention, that a catalogue of Irish zoophytes 

 was published by Mr. Templeton, of Belfast, some years ago ; 

 that many of Ellis's specimens were obtained on the Irish 

 coast ; and that a list of unrecorded species was published 

 by Mr. Thompson in the 'Annals of Natural History' for 

 June 1840, at which time my Catalogue was with Mr. Taylor, 

 the editor, for publication. I must not omit to notice also, 

 that many rare species of zoophytes were procured by Mr. 

 R. Ball and Miss Ball of Dublin, at Youghal, county of 

 Cork. 



I have now brought the enumeration and description of 

 the species to a conclusion. During the compilation of this 

 Supplement I have had occasion to make various references 

 to Dr. Johnston, who has always promptly and kindly favoured 



