Reviews — Satch 8^ Corstorphine — Geology of 8. Africa. 413 



On the other hand, there are wanting many forms at Wismar, 

 found by Lenz at Travemiinde. He mentions 137 species from 

 Lubeck, while there are only 101 at Wismar. Only 70 species are 

 common to both places, and 67 are peculiar to the Lubeck district, 

 namely : — 



Sponges 



Coelenterata ... 



Echinodermata 



Vermes 



Bryozoa 



Crustacea 



Mollusca 



Tunicata 



2 



7 

 1 



17 



2 



12 



24 

 2 

 —67 



Most of these, Braun holds, have their furthest eastern limit in the 

 Travemiinde or Lubeck district, while Wismar itself seems to be the 

 furthest eastern limit of many others. 



{To he concluded in our next Number.) 



:r -jEi '\r n :hi "vt" s. 



I. — The Geology of South Africa. By F. H. Hatch and 

 G. S. CoRSTOKPHiNE. 8vo ; pp. 348 and xiv, (London • 

 Macmillan & Co., 1905. Price 21s. net.) 



THE discovery of gold and diamonds in the Transvaal has been 

 the parent of many literary prodigies, some great, some small, 

 but mostly of the mouse-like kind. Among the latter, papers on 

 the origin of gold in the banket, the extension of the main reef, 

 and countless pamphlets on the geology of the Transvaal form 

 a conspicuous feature. 



The authors of the present work attempt to collect into a small 

 compass the varied sources of information relating to the geology of 

 the Transvaal, and to a less degree that of South Africa as a whole. 

 Those acquainted with the literature of the subject will admit that 

 they have succeeded in producing a clever abstract of a most 

 bewildering subject. Those fresh to the enquiry will be spared the 

 trouble of digesting much dead matter, or if they desire to do so 

 they may consult the bibliography given at the end of the volume. 



Ee vie wing the book as a whole, its prominent feature lies in the 

 small space into which the authors have skilfully compressed most 

 of the essential problems dealing with the geology of a vast tract of 

 country. One is horrified to think how many volumes a studious 

 German might have filled and yet not have advanced our know- 

 ledge of the subject any further, if so far. Several years' practical 

 acquaintance with the geology of South Africa has enabled the 

 authors to avoid the pitfall of voluminosity. They have, perhaps, not 

 altogether escaped the unaccountable mesmerism that diamantiferous 

 deposits seem to exercise on the skilled and unskilled mind. On 

 the other hand, important dynamical and physical problems are 



