AUTHOR S PREFACE ix 



Huxley, F.R.S. (VIII), Sir Guy A. K. Marshall, C.M.G., F.R.S. 

 and Mr. B. P. Uvarov (X), Mr. H. C. Sampson, CLE. (XI, XII, 

 and XIII), Dr. F. C. Kelly, Professor F. A. E. Crew and 

 Mr. A. D. Buchanan-Smith (XIV), Dr. H. H. Scott (XV, XVI, 

 and XVII), and Dr. L. Mair (XVIII). I must again emphasize 

 'that the mention of their names in no way commits them to 

 responsibility for opinions expressed or factual accuracy. 



The photographs were taken by the author during the tour of 

 the African Research Survey, with the exception of the lower 

 photographs of Plates II and VIII, for which I am indebted to 

 Dr. P. W. Richards and Dr. Cicely Williams respectively. 



E. B. WORTHINGTON 



September jgj8 



