FORESTRY OF WEST AFRICA. 31 



tion in 1841, which formed the basis of the 'Flora 

 Nigritiana' of Dr. Hooker and Mr. Bentham, pub- 

 lished in 1849. 



2. The plants collected by Mr. Charles Barter 

 under Dr. Baikie's Expedition in 1857, 1858, and 

 1859, as well as those of the latter gentleman. 



3. The important contribution made by Mr. Gustav 

 Mann, under the auspices of the Admiralty, in Fer- 

 nando Po, St. Thomas and Prince's Island, Old 

 Calabar, Cameroon Mountains, Corisco Bay, Rivers 

 Muni and Gaboon, and the Sierra del Crystal. 



4. Collections chiefly in the neighbourhood of 

 Abbeokuta, by the late Dr. Irving. 



5. The collections of Rev. W. C. Thomson from 

 Old Calabar and its neighbourhood, from Senegambia 

 by Heudelot and Leprieur, of M. Bidjem and of 

 Don, Whitfield, Miss Turner, and others from Sierra 

 Leone. 



The collections in the Herbarium of the British 

 Museum have also been referred to ; of Afzelius, 

 Smeathmann, Daniell, and others of Sierra Leone, of 

 Leprieur and Perrottet in Senegambia. 



For the material from Lower Guinea, Professor 

 Oliver acknowledged his indebtedness to Dr. Friedrich 

 Welwitsch as regards the Congo, to Professor Christian 

 Smith, to Captain R. F. Burton, and to Dr. Curror as 

 regards Elephants' Bay. 



Although it may be advanced that such references 

 have to do with the Science of Botany rather than 



