Birds of Awiubon Island. 229 



deep crater of a volcano, tall forest-trees rising up in tiers 

 all round it to a height of some 500 feet. Beyond, the 

 ground begins to rise again till it attains a height of some 

 3000 feet, forming a narrow watershed, and the whole way 

 the ground falls steeply on both sides to the sea. It is 

 thickly wooded, and this fact raised my hopes of getting a 

 good collection, but after many fatiguing tram^js the birds 

 only represented nine species, all of which were previously 

 known to science. 



The north side of the island is less thickly wooded — in 

 fact, there are portions of open grass-country, interspersed 

 with plots of cassada and yam, grown by the natives. 

 There is also a fine orange on the island, large and with a 

 thick skin which peels off easily, but the inhabitants live 

 chiefly on fish. On the south side of the island there is a 

 small colony called San Pedro, numbering about thirty 

 people. 



The rows of oblong wooden huts of San Antonio, 

 ensconced in a thick grove of cocoanut-trees, is typical of 

 the African villages one sees depicted in the older books 

 of travel — those of Stanley, for example. 



The island has poor soil, very stony and volcanic. We 

 remained here until February 20th, when we left in the 

 small Spanish steamer ' Annobon.' 



List of Species. 



1. *Zosterops griseovirescens. 



Zoster ops (jriseovirescens Bocage, Jorn. Sci. Lisboa, 1893, 

 pp.18, 44; id. 1903, p. 56; Shelley, Birds of Africa, ii. 

 1900, p. 186 ; Salvadori, Orn. Golfo d. Guinea, iii. 1903, 

 p. 94 ; Bannerman, Ibis, 1912, p. 237. 



a-d. (J cJ cJ ? ad. (Nos. 2, 6, 7, 8). Lake Anuobon. 

 14.ii.09. 



e,f' S S ad. (Nos. 3, 5). Lake Annobon. 17.ii. 09. 



y. $ ad. (No. 1). „ „ 18.ii.09. 



h. S ad. (No. 4). „ ,, 19. ii. 09. 



Zosterops griseovirescens can be distinguished at a glance 

 from the other members of the genus inhabiting the islands 



