Petrels from the North- East Pacific Ocean. 595 



having a broad lighter tip giving a scallopped appearance. 

 The remiges and rectrices sooty-black, the inner webs of 

 the primaries brown. A white streak under the eye. All 

 the under surface from chin to under tail-coverts pure white : 

 lores ashy ; under the eyes and sides of neck the feathers 

 tipped with white, while there is a patch extending on to 

 the sides of the breast, where the dark and white are about 

 equal, having a mottled appearance. The shorter tail- 

 coverts are white with brown spots near tips, while the 

 longer ones are all black with scant white tips. All the 

 edges of the under wing-coverts brown, succeeding row half 

 white, centre pure white : i. e. the marginal coverts brown, 

 the lower primary coverts and under secondary coverts 

 pure white. Axillaries pure white. The bill is blue-black ; 

 legs and feet distinctly particoloured in the typical puffinoid 

 manner, judging by the dried skin. 



Type. '* North Iwojima, Bonin Is., Feb. 1910. (Estre- 

 lata longirostins (Stejneger) " is the label with full data in 

 Japanese. 



Culmen 32, wing 211, tail 81, tarsus 42, mid-toe 40 mm. 



Others measure : — 



Culmen 31, wing 21 6'5,tail 79, tarsus 40, mid-toe 39*5 mm. 

 „ 31, „ 214, „ 80, „ 41, „ 40 „ 



This is a most interesting addition to the genus Pufflims 

 s. str., its nearest relatives being Pufjinus neiveUi Henshaw 

 and P. auricularis Townsend, the correct name of which 

 Mathews has shown to be P. opisthomelas Cones. It cannot 

 be confused with either, though we know the former only from 

 description and it is said now to be extinct or nearly so. 

 It is separable at once from P. newelli in the difference of 

 the coloration of the upper surface and the under tail- 

 coverts, and from P. opisthomelas Cones (nee auct.) in the 

 different upper coloration and size. It has the wholly white 

 malar region of P. newelli, but the sides of the neck are 

 mottled like P. opisthomelas Coues. 



Mathews (Birds Austr. vol. ii. 1912, p. 67) wrote : — 



" The acquisition of material from the Pacific points to 

 the fact that Procellaria obscura Gnieliu mav after all have 



