8 PREFACE 



We are indebted to the Government of Nigeria, not only for 

 the valuable series of specimens sent to the School of Forestry, 

 but also for assistance in, the publication of this brochure, the 

 whole of the cost having been borne by that Government. 

 For this we tender best thanks. 



HERBERT STONE. 

 H. A. COX. 

 SCHOOL OF FORESTRY, 

 Tin: UNIVERSITY, 

 CAMBRIDGE, 



January 1, 1922. 



