MONOGRAPH OF THE PETRELS. 



portion of the bill pale flesh-coloured, and the base and nares light cobalt-blue. The 

 feet are pale flesh-colour, the webs washed with yellow, and the claws black. The 

 iris is dark brown, and the pupil blue-black " (Eagle Clarke, Ibis, 1907, p. 336). 

 These colours are more or less confirmed by other observers. 



The description is taken from a male bird from Valparaiso, obtained by Admiral 

 Markham. The bird figured in the plate is a specimen from Mazatlan, both being in 

 our own collection. 



168 



