310 Mr. Boyd Alexander on the 



proximity of Fernando Po to Cameroon, it is, however, 

 to be expected that a number of these local forms will 

 eventually be found in the latter when the highlands of that 

 country have been thoroughly investigated. 



In conclusion, it may be stated that the rich fauna of 

 Fernando Po supports the theory that this island at one 

 time formed part of the mainland. A large proportion of 

 its birds are West African, while many species of its plants 

 have been found to occur in the highlands of Abyssinia. 

 The Peak of Fernando Po and the Cameroon Peak appear to 

 rest on the same base, the narrow channel (30 miles wide) 

 now separating them having a depth of only 290 feet, which 

 suddenly falls on both sides to GOO fathoms. 



The distribution of the species of birds recorded up to the 

 present time as occurring in Fernando Po, relatively to the 

 continent of Africa, may be stated as follows : — 



My best thanks are due to Dr. Bowdler Sharpe for his 

 assistance in the identification of my birds. 



Part II. — List of the Species of which specimens were 



OBTAINED, WITH FlELD-NoTES. 



[The arrangement and nomenclature used are those of 

 Shelley's ' Birds of Africa/ except where otherwise stated.] 



1. Cinnyris preussi, Reichen. 



Cinnyris preussi Shelley, B. Afr. i. no. 44 (189G), ii. p. 81 

 (1900). 



I obtained a fine series of this Sun-bird, which is widely 

 distributed over both the northern and southern portions of 

 the island and inhabits the hill-ranges, where it is found in 

 pairs. I procured specimens close to the Peak itself. It is 

 essentially a highland bird, differing in this respect from 

 C. chloropygia, the range of which is limited to the low 

 cultivated portions of the island. 



