332 Reports and Proceedings — Geological Socief// of London. 



The author observes that the Eocene molluscan fauna of Trinidad 

 shows no near alliances with other known faunas, thus differing 

 from the well-known Miocene fauna of Haiti, Jamaica, Cuba, Trin- 

 idad, and other localities. Only one mollusc is common to the 

 Eocene and Miocene of the West Indies. The shallow- water fora- 

 minifera, are found in both Eocene and Miocene, whilst the deep- 

 water foraminifera are nearly all of existing species. 



It would appear that during the Cretaceous and Eocene periods a 

 sea of variable depths (up to 1000 fathoms) occupied the region now 

 containing the microzoic rocks of Trinidad, whilst a mountain-range 

 (which may be termed the Parian range) extended continuously 

 from the north of Trinidad to the littoral Cordillera of Venezuela, 

 forming the southern boundary of the Caribbean continent, and 

 possessing no large streams to transport mechanical sediment into 

 the Cretaceo-Eocene sea which opened eastward into the Atlantic. 



An Appendix by Mr. J. W. Gregory deals with the microscopic 

 structure of the rocks. 



2. "The Bagshot Beds of Bagshot Heath (a Rejoinder)." By the 

 Eev. A. Irving, D.Sc, F.G.S. 



The author maintains that the northerly attenuation of the Lower 

 Sands and of the 'green-earth series' between the two principal brick- 

 claj'S of the district is an established fact. He insists on the value 

 of the Wellington College well-section as a vertical datum-line, on 

 account of its proximity to the northern outcrop (which is not the 

 case with the Goldsworthy section). But it does not stand alone, 

 for the well-section at the Bagshot Orphan Asylum gives practically 

 the same sequence, and affords strong evidence of the thinning 

 northward of the above-named deposits. (Other instances cited by 

 the author in ' Recent Contributions,' etc., corroborate the reading 

 he has adopted.) The Goldsworthy section itself lends strong 

 corroborative evidence as to the value of the College well-section. 

 The evidence of attenuation in the direction of Bracknell the author 

 reserves for the present. In his paper published in the February 

 number of the Society's Journal for the current year, Mr. Monckton 

 ignores the determinative value of stratigraphical alignment of the 

 clays claimed as the basal clays of the Middle group with clays of 

 the same character seen cropping out from below the ' green-earth 

 series ' at no great distance. This evidence of stratigraphical align- 

 ment must be allowed due weight when set against evidence derived 

 from such lithological characters as the presence of pipe-clay, mica, 

 and false-bedding. The author considers that the argument as to 

 the fossil evidence is over-stated in the above-mentioned paper. 



After criticizing some of the remarks in Mr. Monckton's paper, 

 the author adds some notes on the sections at Farley Hill, Bearwood, 

 and Wokingham. 



3. "Notes on the Geology of the Nile Valley." By E. A. Johnson 

 Pasha and H. Droop Richmond, Esq. (Communicated by Norman 

 Tate, Esq., F.G.S.) 



The rocks on either side of the Nile are chiefly Eocene (and 

 Cretaceous ?) from Cairo to Esneh ; south of this is sandstone, which 



