go [Proc. B N.E.C., 



paratively free from stones, and which has been cut through 

 by the stream that runs through the glen. This clay was first 

 examined by Mr. S. A. Stewart some 25 years ago, and four 

 species of molluscan shells were obtained, two of them, Leda 

 'pygmcea and Leda minuta, being usually quite perfect.* A 

 sample of the clay which he gave me contained Foraminifera 

 in abundance, twenty-nine species being found, f 



Recently, on two occasions, I visited this locality, and 

 brought away about fourteen pounds weight of the clay. The 

 fioatings taken from the clay, and which weighed only a few 

 grains, were all that was examined. Foraminifera were in the 

 greatest profusion, and the specimens were in fine preservation. 

 Amongst the less common forms the following may be men- 

 tioned : — Oylitlialmid'ium carinatum, Verneuilina spimdosa, 

 V. pygmma, Bolivina serrata, B. obsoleta, Lagena depressa, 

 L. clathrata, L. ornata, Marginulina costata, Pullenia quin- 

 queloha, Discorhina minutissima, Pulvinulina Kar stent, P. 

 nitidula, Non'ionina pauperata and Polystomella macella. 



The following six forms are only known as recent British 

 species from the West coast of Ireland, the two last being also 

 found off the West coast of Scotland: — Polystomella suhno- 

 dosa, Cassididina Bradyi, Lagena fmhriata, Rhahdogonium 

 tricarinatum, Nonionina orbicularis, and Planispirina con- 

 traria. The occurrence of these species would lead us to infer 

 that when the clay at the Knock Glen was being deposited, 

 the land stood at a much lower level than now, and when 

 the marine conditions were very similar to what now prevails 

 off the West coast of Ireland. 



The following is a list of the species obtained from this 

 clay : — 



FORAMINIFERA. 



Bdoculina ring ens (Lamk.) — Very rare, specimens large. 

 Miliolina seminulum (Linne). — Common, specimens large. 



* Stewart— " Mollusca of the Boulder Clay of the North-East of Ireland." Proc. 

 Belfast Nat. Field Club. App. Vol. I., p. 168, 1879-80. 



t Wright— " Post-Tertiary Foraminifera of the North-East of Ireland." Proc. 

 Belfast Nat. Field Club. App. Vol. I., p. 161, 1879-80. 



