26 Revieu's — Geological Survey — 



Truncatulina, PuhiniiUna, and Botalia. Fifteen of the 18 species 

 are already known from the Cretaceous and Tertiary strata of this 

 country and Germany ; they are all such as would be found in 

 quite shallow water. Of the Ostracoda, one doubtful form is of 

 Oolitic age, 4 occur also in the Cretaceous rocks of this country, 

 whilst 2 are described as new. The author states that the general 

 facies of these Microzoa indicates a position intermediate between 

 the Lower and Upper Cretaceous series. 



8.— Geology of the Transvaal, by Dr. G. A. F. Molengeaaff. 

 Translated from the French by J. H. Ronaldson, M.E. AVith 

 Additions and Alterations by the Author. Eoyal 8vo ; pp. viii, 90, 

 19 figures ; pi. i, Geological Sketch Map ; pi. ii, Geological. 

 Sections. (Edinburgh and Johannesburg, 1904.) 



This memoir appeared originally in the Bull. Soc. Geol. de France, 

 1901, and a notice of it was given in the October Number of the 

 Geoi. Mag. (p. 475) of the same year. The translator states that 

 the English edition has been undertaken in the hope of bringing 

 it within the easy reach of many busy men. The author has added 

 a new chapter and corrected and augmented the others, and a list 

 of the principal works of reference, brought down to the present 

 year, is appended. This general sketch by a geologist so capable 

 and experienced as Dr. Molengraaff may safely be commended to 

 all who are interested in the seoloffical structure of the Transvaal. 



I^ E "V I E "W S. 



1. — Memoirs of the Geological Survey of England and 

 Wales. Sheets 355 and 356 : Geology of the Country 

 round Kingsbridge and Salcombe. By W. A. E. Ussher, 

 F.G.S. 



THIS memoir is a very interesting and valuable contribution to 

 the geology of Devonshire, although the area thus mapped and 

 described is limited in extent. The bulk of the rocks consist of 

 Devonian slates, etc., bordered on the south by the Metamorphic 

 schists of the Salcombe estuary (Start and Bolt rocks). Within the 

 area, likewise, are one or two remnants of New Red rocks, whilst 

 the phenomena of Pleistocene and Recent deposits, including 

 modern beaches, afford much material for study and investigation. 

 Yet the chief interest of the memoir centres in the description of 

 the Devonian and Metamorphic rocks, and in their relation to each 

 other along a boundary which extends from sea to sea. 



In these days of thorough research, when there would seem to be 

 so little left for posterity to accomplish, it is some consolation to 

 find that even within the limits of a single English county there are 

 yet problems in its geological history which cannot be said to have 

 been altogether solved. Amongst these questions still sub judice, there 

 are few more interesting and perhaps none more obscure than the true 



