APPENDIX. 



Foraminifera from the Estuarine Clays of Magheraraorne, 



Co. Antrim, and Limavady Station, Co. Derry. 



By JOSEPH WRIGHT, F.G.S. 



In a list of the Post-Tertiary Foraminifera of the North-East of Ireland, 

 which I had the honour of bringing before this Club in March, 1880, and which 

 was published, with records from other places, in the Appendix of your Proceed- 

 ings, 1879-80, I gave the results from Magheraraorne and Limavady Station. I 

 have since re-examined the clays from both these localities, which are the most 

 interesting deposits of their kind in Ireland owing to the quantity of specimens 

 and number of rare forms found in them, with the result that a number of species 

 not then recorded have been obtained. 



I now take this opportunity of revising the nomenclature and classification 

 of my previous lists, and of bringing them into conformity with Brady's Report 

 on the Foraminifera of the Challenger Expedition 1 . 



The foraminifera as well as the clays themselves at these two places are very 

 dissimilar. At Magheramorne, the specimens are usually fairly large in size, 

 especially the Porcellanea. The clay also contains Molluscan shells in consider- 

 able numbers, Ostrea edtilis and Pecten maximus being exceptionally large. This 

 clay must have been deposited at a moderate depth and under favourable marine 

 conditions. 



At Limavady Station the foraminifera are in much greater profusion, and 

 there are few if any Molluscan shells. The clay itself is soft and fine, resembling 

 the mud now deposited in the estuaries of some of our rivers and bays 2 . 



1 Brady Rept. For. H.M.S. Challenger, 1873-1876 (1884). 



■ At Killybegs Harbour, dredgings taken at 7 and 17 fathoms consisted of a 

 fine turfy mud, which yielded numbers of minute Lagena and other foraminifera 

 (Proc. Belfast Nat. F. Club Appendix 1880-81, p. 179). A still softer and finer 

 mud, taken between tides a few yards east of Horn Head bridge, Sheep Haven, 

 yielded foraminifera small in size, in the greatest profusion, the exceptionally 

 large number of 142 species and varieties being obtained. 



