478 JRevieu's — Geology around Bournemouth. 



East and South-Bast areas, as pelagic sediments. This typical 

 Chalk consists of 90-98 percent, of carbonate of lime; the proportion 

 of silica is, in general, insignificant, save in the I. labiatus zone, which 

 shows an analysis of 14 per cent. ; the argillaceous materials do not, 

 as a rule, exceed 1 per cent. The Senonian chalks, which are now 

 poor in micro-organisms, were probably originally foraminiferal in 

 character. The changes which have taken place in the original 

 sediments tend to produce a crystalline calcite in which all traces of 

 organization have disappeared. 



In the two concluding chapters of the work a comparison of the 

 Chalk with the recent Glohigerina ooze is made, and the conditions 

 of the Cretaceous sea considered. The author's opinion that the 

 depth of this sea at the time of the greatest depression, when the 

 Belemnitella chalk was forming, did not exceed 150 fathoms, 

 certainly does not err on the side of excess. 



The work is illustrated by some excellent phototypes of sections 

 of different kinds of Gaize and beautifully executed lithographic 

 plates of Eadiolaria, enlarged sections of Chalk, glauconite, and other 

 minerals. G. J. Hinde. 



II. — The Geology of the Country around Bournemouth. By 

 Clement Keid, F.L.S., F.G.S. Memoirs of the Geological 

 Survey. 8vo ; pp. iv, 12, with 14 illustrations. (London, 1898. 

 Price 4d.) 



IN our July number we noticed the recently published Geology 

 of Bognor issued by the Geological Survey ; we have now to 

 announce a companion memoir on Bournemouth, in explanation 

 of the New Series Map Sheet 329. The Director-General, in his 

 preface, briefly refers to previous geological works, while the 

 author gives a concise account of the geological features. Eeference 

 is especially made to the labours of Mr. J. Starkie Gardner, who 

 has done more than any other geologist to make known the life- 

 history of the Eocene strata on the Hampshire coast. Figures are 

 given of a number of the characteristic Barton fossils, and it is 

 interesting to observe that most of the species were illustrated more 

 than 130 years ago by Brander. The strata noted are the Upper 

 Chalk, the entire Eocene series, the Headon Beds, and various 

 Pleistocene and Recent deposits. 



coi2,E,:ESX'Oisr3D:B3srcE. 



THE SUBMERGED PLATFORM OF WESTERN EUROPE. 



Sir, — Mr. Jukes-Browne's letter in the September number of the 

 Geological Magazine must not be left without some reply, not- 

 withstanding that I have since dealt with its subject in some detail 

 at the Bristol meeting- of the British Association. The facts and 



