PEEFACE. 
The present volume completes the description of the Siwalik and Narbada 
Vertebrata as at present known, although one or more supplemental memoirs on 
particular groups may probably be published ; while materials for others may, it is 
hoped, be afforded by future ‘ finds.’ 
My own share in the work commenced in 1876, and its completion has therefore 
taken upwards of ten years. The general advance in vertebrate zoology and 
palaeontology during that period, coupled with the disadvantage of my not having 
had access to the British Museum collections when writing the first and part of the 
second volumes, and my own inexperience when I commenced the work, has entailed 
many changes both in systematic arrangement, and in the determination of par- 
ticular specimens; but the Synopsis of Mammalia given in this volume, together 
with the Introductory Observations, will, it is hoped, render all such emendations 
apparent to the reader.^ The publication of Prof. W. H. Flower’s ‘ Catalogue of 
Mammalia in the Museum of the Royal College of Surgeons’ (1884) marks an epoch 
in the history of the Mammalia, as being one of the first attempts to introduce a 
thoroughly dependable nomenclature, and the generic terms employed in the synopsis 
in the present volume have been brought in the main into accord with those used in 
that work. The lines laid down in that Catalogue have been followed in my own 
‘ Catalogue of the Fossil Mammalia in the British Museum’, now in course of 
publication ; and the writing of that work has enabled me to make numerous emen 
datioiis in regard to the species and range of the non-Indian mammals referred to 
in the course of this and the preceding volumes. Some of these emendations are 
noticed in the Introductory Observations to the present volume, but the reader who 
desires to quote any observations in regard to such mammals is referred to the 
original work. In both the above-mentioned Catalogues generic terms have been 
1 See also “ Catalogue of Siwalik Vertebrata in the Indian Museum,” pt. I. Calcutta (1885). 
