280 Reports and Proceedings — Geological Society of London. 



The microscopic examination of the lower igneous rock shows 

 that it is a basaltic andesite containing plagioclase (acid andesine or 

 oligoclase), pseudomorphs after enstatite, with chloritic and iron- 

 oxide patches. The higher bed sometimes contains fresh augite, and 

 both bands frequently contain rounded grains of quartz. In other 

 examples the felspars appear in three forms, with augite and 

 enstatite, and the rock ranges from an andesite to a porphyritio 

 basalt. The quartz-grains present appear to be xenoliths. The 

 silica-percentage of the rocks on a moisture-free basis varies from 

 61 to 67, while the specific gravities are from 2*74 to 2*99. 



III. — April 24th, 1901. — J. J. H. Teall, Esq., M.A., V.P.E.S., 

 President, in the Chair. 



The Secretary read the following letter, which had been received 

 from H.M. Secretary of State for the Home Department : — 



Hotne Office, Whitehall, Srd April, 1901. 

 SiE, — 



I am commanded^by the King to conTey to you hereby His Majesty's 

 thanks for the Loyal and Dutiful Address of the President, Council, and Fellows of 

 the Geological Society of London expressing sympathy on the occasion of the 

 lamented death of Her late Majesty Queen Victoria, and congratulation on His 

 Majesty's Accession to the Throne. 



I am, Sir, 

 J. J. H. Teall, Esq., Your obedient Servant, 



Geological Society of London, Chas. T. Ritchik. 



Burlington House, W. 



The President drew attention to a framed and glazed copy of the 

 Table of the British Strata by Dr. Henry Woodward, F.K.S., F.G.S., 

 and Horace B. Woodward, Esq., F.E.S., F.G.S., which the authors 

 had kindly presented to the Society. 



In exhibiting a specimen of Crioceras occultus from the Snettisham 

 Clay of Heacham, near Hunstanton, Professor H. G. Seeley said that 

 he had no doubt that the Trigonia hunstantonensis and Crioceras 

 occultus, originally described as from the Hunstanton Limestone, 

 were from the clay at Heacham. The example of Crioceras now 

 shown was found by Mr. F. Deighton, of Cambridge. It differs only 

 as a variety from the type figured in 1865. 



The following communications were read : — 



1. "Notes on two Well-Sections." By the Eev. R. Ashington 

 Bullen, B.A., F.L.S., F.G.S. 



The well-section at Southwark passes through sand and gravel, 

 etc., 34 feet, London Clay 75 feet, Woolwich and Beading Beds 

 56 ft. 9 ins., and Thanet Sand 36 ft. 6 ins., into Chalk which was 

 bored to a depth of 148 feet. 



The well-section at Dallinghoo Post-Office, near Wickham Market 

 (Suffolk), penetrated 53 feet of blue Chalky Boulder-clay, into 

 20 feet of sand and gravel, water being found at a depth of 79 feet. 

 Liassic and Oxford Clay fossils were found in the Boulder-clay and 



