25-S The Irish Naturalist. November, 



Mr. Wright in boulder-cla3\ One valve of an Ostracod, 

 Cythcridea sorbya7ia, Jones, was also found. 



It is rather difficult to account for the irregular distribution 

 of Foraminifera in these sands, but it appears to me that from 

 time to time masses of boulder-clay, containing Foraminifera, 

 slipped or were pushed bj^the ice sheet into Lake Belfast, and 

 were there covered with sand. The fact that the majority of 

 the specimens are worn tends to bear this out. Some of the 

 clay was probably covered unchanged, forming the thin bands 

 of clay ; while some of it became mixed with sands, giving rise 

 to the slightly lighter bands of sand in which I have found 

 the Foraminifera. 



List of Foraminifera. 



Bullinina eleg^antissima, d'Orb.— One specimen. 



Bolivina pllcata, d'Orb. — Common. 



Cassidulina crassa, d'Orb —Very common. 



Lagrena lineata (Will.) — Frequent. 



Lagrena Williamson I (Alcock). — Frequent. 



Lag^ena squamosa (Montag.) — One specimen 



Lagena. marginata, W. & B. — Common. 



Lagrena orbignyana (Seg.)— One specimen. 



Polymorphina lactea (W. & J.)— Rare. 



Uvigcrina angulosa. Will.— One specimen. 



Clobigerlna bulloides, d'Orb.— Common. 



Discorbina obtusa (d'Orb.)— Rare. 



Discorbina rosacea (d'Orb.)— Rare. 



Truncatulina lobatula (W. & J.)— Common. These are not typical 



specimens, but apparently young forms. 

 Rotalla Beccarii (Linne.)— Rare, poor specimens. 

 Nonionina dcprcssula (W. & J.)— Very common. 

 Polystomella macclla (F. & MJ-One specimen. 

 Polystomclla st r I ato- punctata (F. & M.)-Very common. 

 Polystomella arctica, P. & J.-Common. These specimens are not 



typical P. arctica, but approach it very closely. 



Queen's College, Belfast. 



