Reviews and Book Notices. 6i 



Avion ater 



A. subfuscHs 



A. circumscriptus 



A. hortensis 



A. intermedius 



A griolimax agrestis 



Hyaiinia cellaria 



H. alliaria 



H. helvslica 



H. cryst.iUina 



H. pura 



Pyramidula rupestris 



P. rotund at a 

 Hygromia graniilata 

 H. hispida 

 H. rufescens 

 Vallonia pulchella 

 Helicigona arbiistorum 

 Cochlicopa lubvica 

 Pupa cylindracea 

 Clausilia bidentata 

 C. cravenensis. 



making altogether six species of slugs, and sixteen of land- 

 shells ; no fluviatile species were noted. The Clausilia cra- 

 venensis were brought by the geologists from the higher land, 

 and Mr. R. Fowler Jones was the finder of Arion ater and A, 

 subfuscus. Of Agriolimax agrestis, in addition to the type 

 and var. reticulata, which abounded, one example was found of 

 var. lilacina. — W. Denison Roebuck, Leeds. 



SOME NEW BOOKS. 

 GEOLOGY. 



Stanford's Geological Atlas of Great Britain and Ireland (with 



plates of characteristic fossils) by Horace B. Woodward, F.R.S., F.G.S. 



Second edition. 190 pp. and 50 coloured geolog-ical maps and plates of 

 fossils. 12/6 net. 



In this compact little volume Mr. H. B. Woodward has succeeded in 

 compressing an excellent summay of the geology of the British Isles. There 

 is an admirable introduction referring to the general geological structure 

 of the Islands, an account of the igneous, sedimentary and metamorphic 

 rocks, a chapter on the mineral products, detailed descriptions of the 

 geology of the various counties, descriptions of the features observable 

 along the principal lines of railway, and an account of the geological 

 structure of Ireland. There are also the clearly-coloured maps (with 

 key), and tables of characteristic fossils. 



In the present edition Mr. Woodward has included much relating to 

 Ireland ; the maps have been brought up to date ; and in other ways the 

 work has been made as useful as possible for its size. Mr. Woodward's 

 name on the cover is quite a sufficient guarantee for the general accuracy 

 and excellence of the publication. The amateur geologist will be par- 

 ticularly pleased with the clearness of the maps, and also with the fact that 

 the principal collecting grounds are indicated. 



Genesis of Metallic Ores and of the Rocks which enclose them, 

 by Brenton Symons. London ; ' The Mining: Journal.' 1908. xxxiii. + 



494 PP- 



In this work the author has been instigated by the desire to afford to 

 young students a popularly written book, as devoid of technical expressions 

 as the nature of the subject will permit. The author by no means confines 

 himself to his favourite Cornwall, nor to the British Isles, but draws, 

 illustrations and examples from every district of the globe. The use of 

 the word " geologic ' amongst others, indicates the influence of America 

 and American authors upon him. He also has his portrait as frontispiece,, 

 which is also usually a bad sign, no matter how good looking the author may 

 be. The volume is divided into three ' books ' : — ( i ) Sedimentation of Rocks 

 and Ores ; (2) Metamorphism of Strata ; and (3) Segregation of Metallic 



1909 February i. 



