Reports and Proceedings — Geological Society of London. 89 



The later years will be not only of far greater importance to 

 zoologists, but will be a thousandfold more prolific in the number 

 of works to be referred to, and of the objects described in them, 

 than those of the previous half-century. We compliment the author 

 on the grand Yolume he has produced, and the Syndics, of the 

 Cambridge Univei'sity Press for having printed it in so accurate and 

 admirable a manner. 



DBEi^oieTS j^.isriD :E'I^oc;E!EX)II^TC3-s. 



Geological Society of London. 



I. — December 3rd, 1902. — Professor Charles Lapworth, LL.D., 

 F.R.S., President, in the Chair. The following communications 

 were read : — 



1. "On some Well-sections in Suffolk." Bv William Whitaker, 

 Esq., B.A., F.E.S., F.G.S. 



Notes of thirty-one new wells have accumulated since 1895, some 

 of them giving results which could not have been expected. A trial 

 boring for the Woodbridge Waterworks Company gave a depth 

 of 133f feet down to Eocene beds, and a thickness of Crag about 

 double of any before observed in the neighbourhood. An analysis 

 of the saline, hard water yielded is given. Three explanations are 

 suggested : a channel, a huge ' pipe ' in the Chalk, or a disturbance 

 such as a fault or a landslip ; but the author is not satisfied with 

 any of them. Two borings at Lowestoft show that Crag extends 

 to a depth of 240 feet in one case and over 200 feet in another, 

 confirming estimates of Mr. Harmer and Mr. Clement Eeid. In one 

 of these, Chalk was reached at 475 feet. Three other wells in the 

 neighbourhood confirm the great depth of the newer Tertiary strata. 

 Sections are also given from the following places : — Boulge, Hitcham 

 Street, Ipswich (corroborating the evidence for a deep channel filled 

 with Drift given by the section at St. Peter's Quay, New Mill), 

 Shotley, Stansfield, and Brettenham Pai"k. The last shows the 

 greatest thickness of Drift recorded in the county, namely, 312 feet. 



2. "The Cellular Magnesian Limestone of Durham." By George 

 Abbott, Esq., M.K.C.S., F.G.S. 



The Permian Limestone covers about 1|- square miles near 

 Sunderland ; it alternates with beds of marl containing concretionary 

 limestone-balls, and attains a thickness of 65 feet or so. The 

 cellular limestones frequently contain more than 97 per cent, of 

 calcium-carbonate. Magnesium-carbonate occupies the interspaces 

 or 'cells' of this limestone, and also the spaces between the balls. 

 The hundred or more patterns met with in it can be arranged into 

 two chief classes, conveniently termed honeycomb and coralloid, 

 each with two varieties; and each class has four distinct stages, 

 both classes having begun with either parallel or divergent systems 

 •of rods. The second stage is the development of nodes at regular 

 distances on neighbouring rods; and these in the third stage, by 



