306 Geological Society. 



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 depth (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 

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



The Author maintains that the northerly attenuation of the Lower 

 Sands aud of the ' green-earth series ' between the two principal 

 brick-clays 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,' &c. 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 align- 

 ment 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 strati- 

 graphical alignment 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, Bear- 

 wood, and Wokingham. 



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

 Pasha and H. Droop Richmond, Esq. 



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

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

 the Authors believe to be Carboniferous and to yield possible indi- 

 cations of coal, reaching to near Assouan, where it meets the granite 

 and basalt of that region ; a few miles south the sandstone begins 

 again and continues to Wady Haifa, broken only hy granite dykes. 



The granite is intrusive into and alters the sandstone, whilst the 



