604 Messrs. G. M. Mathews and T. Iredale on some 



which is quite distinct from the bird breeding in southern 

 South America. 



It should be observed that instead of '^ P/' carneipes and 

 " P." ienuirostris, the two anticipated breeding " Pnffinus" 

 in Japanese seas, Owston sent two forms of " P." yriseus, 

 a new bird for the locality in every sense. What else may 

 still be hidden ? 



Genus Cookilaria. 



Cookilaria Bonaparte, Comptes Rendus Acad. Sci. Paris, 

 vol. xliii. 185(5, p. 994. 



Type (by original designation) : Procellaria cookii Gray. 



In the 'Birds of Australia/ vol. ii, 1912, pp. 129-132, 

 Mathews showed that Pterodroma must be used instead of 

 yEsfi'elata on the score of priority, if the association of 

 species brought together in the 'Monograph^ be maintained. 



Later, in the 'Ibis,' 1913, p. 233, the present writers 

 differentiated the genus Cookilana for the type species, 

 leaving all the rest in the genus Pterodroma. The group is 

 very difficult to segregate, as Cones experienced; but it is 

 just as certainly polyphyletic. At present the one fact 

 certain is that Cookilaria is easily recognisable. 



Mathews {loc. cit. p. 168) wrote : — 



" The group of small Petrels ranged round Pterodroma 

 cookii is well marked, and the subspecies are easily recog- 

 nisable. At present the subspecies known are ; — 



Pterodroma cookii cookii Gray. New Zealand. 



„ „ leucoptera Gould. East Australia. 



„ ,, nigripennis Roth- Kermadec Group. 



schild. 

 „ „ axillaris Salvin. Chatham Islands, 



New Zealand. 

 „ „ defilippiana Gigl. Western South 



& Salvad. America. 



„ ,, longirostris Stejneger. Japanese Isles. 



The receipt of specimens of (Estrelata hypoleuca Salvin 

 (Ibis, 1888, p. 359, Krusensteru Is.) shows this species 



