1V INTRODUCTION. 
In the case of each species I have endeavoured to give a refe- 
rence to some standard work or paper on the ornithology of that 
part of Africa from which the specimens come. 
I cannot conclude these introductory remarks without con- 
gratulating myself on my rare good fortune in having had the 
supervision of my friend M. Jules Verreaux over my Collection ; 
and it is mainly at his representation that I have been induced 
to publish the present Catalogue. His talents are so well known 
that it is hardly to be wondered at that an examination of the 
series I possess of some of the rarer species should have led to 
some interesting identifications, which I lose no time in bringing 
before the notice of ornithologists. 
Ry Bass 
Zoological Society of London, 
11 Hanover Square, London, W. 
January 20, 1871. 
