1892-93.] 523 



the species of shells ; and to our fellow-member, Mr. Joseph 

 Wright, F.G.S., who has examined samples of the various beds 

 for Foraminifera. 



(Signed), GEO. DONALDSON. 



W. J. KNOWLES. 

 R. LLOYD PRAEGER. 



Mr. Wright, in reply to a call from the chair, said that, as 

 the result of a careful examination, he had found Foraminifera 

 in all the Ballyrudder clays and gravels, many of them being 

 forms which are now most abundant in shallow water around 

 our coast. They were invariably small, starved specimens, and, 

 with the exception of one bed, from which twenty-three different 

 species were obtained, these microzoa were very rare in the 

 deposits. Nonionina depressula was the most abundant fora- 

 minifer in the clays. Cassidulina crassa was also frequent, 

 and these two species differed less in size than the others. 



It was instructive to compare the relative sizes of these glacial 

 microzoa with the average size of the same species as they are 

 now found living in British waters. The following are the 

 relative sizes (bulk) of six of the commoner species of the clays 

 as compared with recent British examples : — 



Globigerina bulloides, -$-5. Roialia beccarii, -^ T . 



Orbulina utiiversa, -jo- Nonionina depressula, \. 



Iruncatulina lob alula, -^-5. Polystomella crispa, -£, 



6 5* 



Mr. Wright stated that a short time ago he received from 

 Mr. S. A. Stewart a sample of Glacial clay from St. John's, New 

 Brunswick, containing a number of bivalve shells. On exa- 

 mining it microscopically, it yielded four species of Foraminifera, 

 viz. : — Nonionina depressula, very common; Cassidulina crassa, 

 frequent ; Polystomella striato-punctata, frequent ; and Milio- 

 lina seminulum, very rare. These forms have all been met 

 with in the Ballyrudder clays, but the New Brunswick specimens 

 were of normal size, and not depauperated as in the latter beds. 



Mr. Wright submitted the following table showing the 



