JOURNAL OF CONCHOLOGY. 239 



fatal. But the effect of this higher temperature would be felt 

 much more by littoral and sub-littoral species than by those 

 which live in deep water. It might well be fatal to the former 

 and not to the latter. 



If the above-named species are not 'survivals,' but have 

 subsequently migrated south, the inference is that the tempera- 

 ture of the sea bottom, in the areas mentioned, is again lower ; 

 but is there any evidence of such a renewed refrigeration ? The 

 occurrence of Cassidaria tyrrhena, a Meditteranean species, off 

 the south-west of Ireland (dredged by Professor Haddon and 

 paity in 1886), lends no countenance to this view. 



Our present knowledge of the laws which control the dis- 

 tribution of marine animal life is, however, too limited to 

 justify us in dogmatizing. It will be wiser simply to record the 

 facts and to leave to those who shall follow us — with wider ex- 

 perience and a fuller record — the solution of this and the many 

 other interesting problems which are presented to the mind of 

 eveiy intelligent student of marine zoology. 



CONCHOLOGICAL SOCIETY 

 OF GREAT BRITAIN AND IRELAND. 



PROCEEDINGS. 



174th Meeting, Jan. 8th, 1890. 



Mr. John W. Taylor, F. L. S., Vice-President, in the chair. 



New Member Elected : Mr. Isaac Henry Burkill, Cheltenham. 



Donations announced and thanks voted : Proceedings of Royal 

 Society of Queensland and of Royal Physical Society of Edinburgh, The 

 Naturalist, Beckett's List of Mollusca of Great Yarmouth, Prodromus of 

 Zoology of Victoria, and the skins oi Lit/tax iiiaximus and Arion boitrgiiignati 

 which were exhibited for Mr. Adams. 



Exhibits. 



On behalf of Mr. L. E. Adams, B.A., were shown skins of Li max 

 maxiiinis and Arion Iwurgiiignafi from Penistone, which he had mounted 

 upon card and varnished, and which afforded a successful method of dis- 

 playing the markings. 



