Sir W. Jardine on some Birds from Western Africa. 87 



across ; tail black, the four outer feathers narrowly barred with 

 yellowish white ; belly and vent yellowish brown, clouded with 

 brown, and having the shafts of the feathers marked with a white 

 line ; legs and feet appear to have been greenish. 



ft. in. 



Entire length of the skin, rather stretched 2 2 



Of bill to extremity of rictus 5 



Of wing from bend to end of fourth or fifth quills... 1 



Of tarsus 3 



Of middle toe S^V 



Ibis chalcopterus, Vieill. Old Calabar river. 



Thalassidroma Wilsonii appears to present no difference from 



American specimens. The range of this petrel will thus be 



very extended. Old Calabar river. 



Larus . The young state of one of the larger species, 



probably L.fuscus {flavipes, Temm.). Old Calabar river. 



Angus tenuirostris, Temm. 



Sterna tenuirostris, Temm. PI. Col. 202. 



Anous leucocapilla, Gould, Proc. Zool. Soc. 



Mr. Gould has lately sent to the Zoological Society of London^ 

 descriptions of three or four species of this genus which he con- 

 sidered undescribed. Upon seeing our bird from the Bonny 

 river, he sent us for comparison a species which he had named as 

 above from Raines island in Torres Straits. On comparing these 

 specimens of nearly equal size together, the plumage of the Torres 

 Straits bird is of a slightly grayer tint, and the pure white of the 

 crown shades more gradually upon the cheeks and backwards into 

 gray, assuming upon the head and neck the appearance repre- 

 sented in Temminck^s figure of Sterna tenuirostris from Senegal 

 and the western coasts of Africa, and to which we refer both birds, 

 notwithstanding the variations that occur. 



The differences in the colouring of the sexes and those inci- 

 dent to the seasons being yet not well understood, and the species 

 of Anous being in many instances closely allied, we add a de- 

 scription of our present bird. It was received in the month of 

 November, and calculating the passage homewards and other de- 

 lays, it was probably killed during some of the summer months. 



The forehead, crown and occiput, with a narrow circle round 

 the eye, pure white ; the lores and cheeks very deep blackish 

 brown, which runs over the eye in a narrow line as far as the pos- 

 terior angle and separates it from the white of the crown. The 

 whole other parts of the plumage, except the quills and tail, are a 

 deep shade of the clove-brown of Syme, slightly tinted with gray 

 where it meets the white of the occiput, and on the shoulders 



