2l6 [Proc. B. N. F. C, 



zones, and differing somewhat from that now inhabiting the 

 adjacent waters. 



The Belfast clay forms a thick deposit of large area in the 

 Lagan estuary, and has been examined successively by 

 Thompson 1 , Hyndman 2 , Grainger 3 , Stewart 4 , and the writer 5 . 

 The bed at Magheramorne, on Larne Lough, is singularly rich 

 in shells, a list of which appears in Stewart's paper, mentioned 

 below ; in addition to these, the writer has examined Estuarine 

 Clays occurring at Eglinton and Limavady Junction, on Lough 

 Foyle, at the mouth of the Bann, and at Larne, Kilroot, 

 Holywood, Kircubbin, Downpatrick, Newcastle, Greenore, and 

 Dundalk. 



The following species of Mollusca are additions to the fauna 

 of the North of Ireland Estuarine Clays : — 

 Lima Loscombii, G. B. Sowerby. A single valve of this species 



occurred among a large number of examples of its congener 



L. hians } at Magheramorne. 

 Crenella decussata, Montagu. This rare and beautiful little 



northern shell occurs sparingly at Magheramorne and 



Larne. 

 Nucula sulcata, Bronn. A single valve in the Downpatrick 



bed. Does not now inhabit the North of Ireland. 

 Nucula nitida, G. B. Sowerby. Eglinton, sparingly. 

 Peptunculus glycymeris, Linne. Frequent at Magheramorne. 

 Kellia suborbicularis, Montagu. Magheramorne, rare. 

 Gastrana fragilis, Linne. A valve of unusual dimensions 



(2*1x1*5), at Downpatrick. Not previously noticed in 



the North of Ireland, either recent or fossil. 

 Mactra solida, Linne. Magheramorne, very rare. The 



varieties truncata .and elliptica have been previously 



recorded from the "Belfast bed. 



1 Belfast Museum Collection. 2 British Association Report, 1857. 3 Natural 

 History Review, Vol. vi, for 1859. 4 Annual Report, Belfast Naturalists' Field 

 Club, 1870-1: Appendix. 6 Proceedings, Belfast N.F. Club, 1886-7: Appendix. 



