598 Mr. D. A. Baniierman on the 



Alexander had already made extensive collections in tlie 

 island of Fernando Po, and it may now safely be asserted 

 that the British Museum possesses unrivalled material from 

 the four principal islands in the Gulf of Guinea. 



I should like here to express my sincere thanks to Mr. W. 

 E,. Ogilvie-Grant for placing these valuable collections at 

 my disposal, and for the help which he and his able assistant, 

 Mr. Wellsj have afforded me in preparing my report. 



To Count Salvadori I owe a debt of gratitude for having 

 already '^made the way easy.'" His excellent papers en the 

 Ornis of Fernando Po, Princess Island, St. Thomas', and 

 Annobon, which he published in IQOS; have cleared up many 

 vexed questions, and I feel that my own contributions 

 are only supplementary to his careful and exhaustive 

 w^ork. 



While engaged on the first of these papers, '^The Birds of 

 Prince's Island," in addition to Boyd Alexander's notes I 

 have particularly made use of the following works dealing 

 with the Ornithology of the island : — 



DoHRN. P. Z. S. 1866, pp. 324-332. 



Keulemans. Nederl. Tijdsclir. v, Dierk, iii. 1866, pp. 374-401. 



Babboza du Bocage. Jorn. Sci. Lisboa, xxix. 1880, pp. 71-72 ; 



id. (2) vii. 1903, pp. 46-52. 

 SousA. Jorn. Sci. LisLoa, xlv. 1887, pp. 42-44. 

 Salvadori. Orn. Golfo d. Guinea, i, pp. 1-16, in Mem. Accad. Sci. 



Torino, 1903. 

 Shelley. Birds of Africa, vols, i-v., 1896-1912. 

 Reichenow. Vogel Afrikaa, vols, i-iii., 1900-1905. 



Several less important papers have been referred to, but 

 I have refrained from giving a bibliography^ as Count 

 Salvadori has already published at the end of each of his 

 papers a comprehensive list dealing with the literature up 

 to 1901. 



Tiie other works dealing with the Ornis of Prince's Island 

 which have appeared since J 901 are enumerated m the 

 list, the most important of Avhich are those by Count 

 Salvadori and Professor Bocage. 



While still in Prince's Island Alexander forwarded to 



