PREFACE 
of this creature amongst the Primates ; but many good 
authorities regard him as " the missing link." 
For the drawings of ancient plant life I am chiefly 
indebted to the works of Sir J. William Dawson, Professor 
Heer, Le Comte de Saporta, and Professor Melchior Neumayr. 
Messrs Macmillan & Company very kindly gave me leave 
to reproduce some figures illustrating Cell Developments 
from Mr T. Jeftery Parker's Elementary Biology. 
All the drawings have been specially made for this book ; 
and I wish to record my gratitude to the artists who under- 
took them. Mr Bucknall, Mr Charlton, Mr Smit long known 
for his excellent drawings of animal life, both living and extinct 
Mr Speed, Mr Whymper and Miss Alice Woodward have, I 
think it will be acknowledged, done their part with signal ability 
and success ; indeed as though they had looked, with their own 
eyes, upon the life and scenes which they so well portray. 
Whilst Mr Wilson, fresh from his travels in "The Discovery" 
in Antarctic regions, has given us what must be a true picture 
of a large part of the surface of the earth during the great 
Glacial times. 
The scientific names of various forms of life, referred to 
in the text, will be found for the most part in the Notes. 
I have also appended a list of the principal books to which 
I feel particularly indebted ; many other works, however, 
have been consulted. 
H. R. K. 
June 1905. 
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