Darling, Dr. Fraser 



Davey, Dr. T. H. 



Davies, William 



Davis, Dr. W. H. S. 



Debenham, Professor F. 



d'Eca, Dr. d' Almeida 



DE Jonghe, Professor 

 Delf, Dr. E. M. 



Delhaye, Monsieur F. 



DE Sequeira, Professor L. A. F. 



Director and Staff 



Driberg, J. H. 



DuREN, Dr. a. 



DU ToiT, Dr. p. J. 



Elton, Charles 

 Engledow, Professor F. L., 



C.M.G. 



Fortes, Dr. M. 

 Fox, Dr. F. W. 



Gardiner, Professor J. S., f.r.s. 

 GiLKS, Dr. J. L., C.M.G. 



GiLLMAN, C., C.M.G. 



Gordon, Dr. H. L. 



Gore Brown, Lt.-Col. S., d.s.o. 

 Grandidier, Monsieur G. 



Gregory, Sir Richard, Bt., 

 f.r.s. 



LIST OF AUTHORITIES 



Formerly Deputy Director, . Im- 

 perial Bureau of Animal Genetics, 

 Edinburgh 



Sir Alfred Lewis Jones Research 

 Laboratory, Freetown, Sierra 

 Leone 



Formerly Empire Grassland Inves- 

 tigator, Aberystwyth 



Wellcome Bureau of Scientific Re- 

 search, London 



Department of Geography, Cam- 

 bridge 



Chief of Veterinary Services, 

 Mozambique 



Institut Royal Colonial Beige 



Westfield College, University of 

 London 



Consultant Geologist to Credit 

 General du Congo 



ficole de M^decine Tropicale, Lis- 

 bon 



Department of Scientific and Indus- 

 trial Research (Food Investigation) 



Department of Anthropology, Cam- 

 bridge 



Directeur-chef de Service de 

 I'Hygiene, Ministere des Colonies, 

 Bruxelles 



Director of Veterinary Services, 

 Onderstepoort Laboratory, Pre- 

 toria 



Director, Bureau of Animal Popu- 

 lation, Oxford 



School of Agriculture, Cambridge 



617 



Chapters 

 XIV 



International Institute of African 

 Languages and Cultures 



Biochemistry Department, South 

 African Institute for Medical 

 Research, Johannesburg 



Department of Zoology, Cambridge 



Formerly Director of Medical and 

 Sanitary Services, Kenya 



Chief Engineer, Tanganyika Rail- 

 ways 



Formerly in Dept. of Medical and 

 Sanitary Services, Kenya 



Shiwa, Northern Rhodesia 



Secretaire-General de la Soci^te de 

 Geographic, Paris 



Editor oi Nature 



XV-XVII 



VI 



XVI 



II 



XIV 



Whole 

 XVII 



II, III 



XV-XVII 



IX, XII, 

 XIV 



XVIII 

 XV-XVII 



V, VI, XIV 



VIII, XIV 

 XVI 



V, XI-XIV 

 XVIII 

 XVII 



VIII, IX 

 XV-XVII 



II-XIV 



XV-XVII 



II, XI-XVII 



II 



Whole 



