80 Reviews—H. B. Mediicott’s and W. T. Blanford’s— 
A noteworthy feature of the Manual is that the separate work of 
each of the two authors is made distinctly clear, the authorship of 
each chapter being stated. It will be seen from this that by far the 
larger share of the labour of drawing up the Manual fell to Mr. 
Blanford, whose great knowledge of Biology has enabled him to 
treat the subject in a far more interesting manner than would have 
been possible to a mere stratigraphist. 
The weakest point of the Manual is the Geological Map of 
India given with it; but for this the authors can hardly be held 
responsible, as they had only to lay down the geological features on 
the best topographical map they could find: and, unfortunately, the 
best available is lamentably deficient in expression of the physical 
features of the country, there being no attempt at any representa- 
tion of the mountains. That no good topographical map of India 
exists on which geologists might work is certainly to the discredit 
of the Topographical and Geographical Departments. ‘The scale of 
geological colouring adopted is also unsatisfactory, being too pale, 
and too little contrasting, to impress the eye readily and favourably. 
The adoption of a livelier scale would be very advantageous for all 
the maps to be issued by the Indian Geological Department. 
The interest of the Manual would also have been considerably 
enhanced if a larger number of sections had accompanied the text, 
for sections, even if only diagrammatic, add wonderfully to the 
facility of understanding and remembering geological facts and 
arguments. 
To take up the text systematically, the preface explains briefly the 
plan of the work, the reasons for the double authorship, and the 
reasons for not giving a chapter on Hconomic Geology, which is 
promised as a separate work, and will, we trust, soon appear. 
The introduction is a lengthy, but very interesting chapter, written 
by Mr. Blanford, which gives a capital résumé of the whole, includ- 
ing an outline of the physical geography of the country within the 
limits of the work, which coincide, roughly speaking, with those of 
the Indian Empire. This is followed by a list of the geological 
formations now recognized, of which ample tables are given. The 
remaining principal topics of consideration are a summary of the 
geological history of India, speculations on the origin of the Hima- 
layan range, and the adjacent Indo-Gangetic plain (the two most 
strongly-contrasting physical features of Northern India), the dis- 
tribution of the recent fauna, and questions of the affinities of 
Indian and Ethiopian mammals, the survival of older types in the 
Indian area, the Glacial epoch, and sub-recent changes of level. 
The Introduction concludes with notices of previous summaries of 
Indian Geology, and some tables of the classification of European 
formations, and of the Animal Kingdom, which are given for com- 
parison. 
The remaining chapters of the Manual treat at length of the 
several geological formations in their principal areas of development, 
those of the Peninsular area being disposed of in the first volume, 
and those of the Extra-Peninsular in the second, the several forma- 
