PREFACE TO FIRST EDITION xiil 
of that journal for his courtesy in having allowed me to make 
use of them here. 
Ihave to thankfully acknowledge the kindness of Dr. P. L. 
Sclater, Secretary of the London Zoological Society, for having 
permitted me to rewrite and amplify, in my supplementary 
chapter, two papers upon Antelopes which were written by me 
for that Society and published in its Proceedings. 
Finally, I would express my gratitude to Mr. Rowland Ward, 
who has devoted so much valuable time and experience to the 
production of my book. 
THE AUTHOR. 
