506 Geological Society. — 



chalks, and inclusions of clay presumably from the Scotland Beds . 

 The bed is followed by buff marls, granular in appearance, and this, 

 again, by marls and limestone, in the upper part of which Globi- 

 f/erince die out and are replaced by Amphistegina and fragments of 

 lamellibranch shells. The whole succession is about 90 feet in 

 thickness, and the beds pass up into basement -reef rocks without 

 coral, and coral-rock. 



Somewhat similar rocks were met with in a shaft at Bowmanston, 

 and they probably occur in other localities. The presence, succession, 

 and relations of these rocks enable the authors to draw conclusions 

 as to the history of the island. 



In the Appendix a list of 146 species of foraminifera is given. 

 15 of these occur only in strata ranging from the Cretaceous to the 

 Pliocene Period. The rocks bear some resemblance to the lime- 

 stones and marls of Malta and to the Globigerina-he&s of Trinidad ; 

 the recent foraminifera indicate that the deposit was formed at a 

 depth of about 1000 fathoms and at some distance from land. 



June 22nd.— W. Whitaker, B.A., F.R.S., President, 

 in the Chair. 

 The following communications were read : — 



1. ' Post-Glacial Beds exposed in the Cutting of the new Bruges 

 Canal.' By T. Mellard Eeade, Esq., C.E., F.G.S. 



The following beds, enumerated in descending order, were found 

 in this cutting : — 



5. Argile des polder3 superieure. 



4. Cardium (edule)-sa,nd. 



3. Argile des polders inferieure. 



2. Scrvhtcularia (plana)-c\a,y. 



1. Peat with the remains of trees. 

 Mechanical analyses of beds 5 and 2 are given. The argile 

 des polders superieure consists mainly of extremely finely 

 divided material, in which sponge-spicules and foraminifera were 

 found. The Gardium-sa.nd yielded many foraminifera and ostracoda, 

 with a few diatoms. The Scrobicultiria-cl&y contained sponge- 

 spicules, many of them apparently derived from older deposits, 

 diatoms, and foraminifera. 



The land-surface on which the peat grew appears to have slowly 

 subsided, in such a manner as to allow of the inosculation of Beds 1 

 and 2 at their junction. Beds 3 and 5 represent the shallower- 

 water phases, and the Cardiwn-s&nd the deepest-water phase through 

 which the area passed as the deposits accumulated. As a whole, 

 these beds are correlated with those ' in Lancashire and Cheshire 

 which overlie the Peat and Forest Bed,' but the wide horizontal 

 extent of the deposits, at levels varying very little, has no parallel 

 in Britain. 



2. 'High-level Marine Drift at Colwvn Bav.' By T. Mellard 

 Reade, Esq., C.E., F.G.S. 



This paper describes a mound of sand capped by Boulder Clay, 

 which occurs 1 mile south by west of Colwvn Bay Station. It 

 measures about 90 yards on the longer axis, which runs north-east, 

 50 yards on the shorter axis, and is situated 560 feet above O.D. 



