232 Bevieivs — Sir A. Geih'e's Geological Map. 



As higher forms are reached no doubt the subject-matter will 

 increase in interest. The author publishes in his preface the names 

 of many people who have helped him in his work, but to none is he 

 more indebted than to Mrs. Seward, " who has drawn by far the 

 greater number of the illustrations," and we may add very well done 

 indeed ! In Volume II the author promises us that the systematic 

 treatment of plants will be concluded, and the last chapters will be 

 devoted to such subjects as geological floras, plants as rock-builders, 

 fossil plants and evolution, and other general questions connected 

 with palseobotany. 



In conclusion, we cannot part from Mr. Seward without expressing 

 our conviction that the volume before us will prove a most acceptable 

 addition to the Biological Series of Cambridge Natural Science 

 Manuals issued by Messrs. C. J. Clay & Sons from the University 

 Press. 



11. — A New Geological Map of England and Wales, reduced 

 from the Ordnance and Geological Surveys, and published with 

 Government Authority under the direction of Sir Archibald 

 Geikie, D.C.L., LL.D., F.E.S. With Descriptive Text. By 

 John Bartholomew & Co. Mounted on cloth and in case, 

 12s. %d. ; on cloth with rollers and varnished, 17s. Qd. (Edin- 

 burgh, 1897.) 



THIS map is on a scale of an inch to ten miles, and is slightly 

 •larger than Eamsay's hand-coloured map published by Stanford. 

 The colour-printing adopted by Bartholomew is excellent, but the 

 tints are not quite so effective as those laid down by hand on the 

 older map, and this is noticeable more especially as regards the 

 Cretaceous and Tertiary strata. The colours, however, are clear 

 and transparent, the topography is accurate, and the railways are 

 shown up to date, including nearly the whole of the Great Central 

 Kailway, which is not yet open to the public. Those parts of 

 Scotland, Ireland, and France which are included in the map are 

 coloured geologically, and there are four longitudinal sections to 

 depict the structure of the country from Holyhead to Beachy Head, 

 from Denbigh to Saltfleet, from the Soiway Firth to Flamborough 

 Head, and across the Isle of Wight. The map is also accom- 

 panied by 28 pages of explanatory notes, which give a concise 

 account of the strata. Future work will no doubt introduce 

 some detail into the large area of "Lower Silurian" rocks in 

 Central and South Wales, and also into the Devonian rocks. 

 We note that the Plymouth limestone is coloured blue, but 

 the Torquay and Brixham limestones are not so distinguished. 

 We observe that the colour adopted for Triassic marls is not at 

 first sight readily to be distinguished from that of the Permian 

 mai'ls and sandstones ; but there is much yet to be done in 

 discriminating Permian and Trias in the field in the Midland 

 and Northern Counties. The Rhjetic beds are indicated in places 

 where they have been mapped by the Geological Survey, but, as 



