■I115INAUKS — PliOClJJ.AlillD.K lM 1 



from Maine and in N. Pacific on Aleutian, Kurile and Copper 

 Islands. Wanders to other seas ; occasionally visits Coasts 

 of lialtic and North Seas, France, Spain, Portugal and W. 

 Mediterranean ; also W. African Coast south to Sierra Leone 

 and Liberia ; Azores, Canaries, and Madeira. Has been reported 

 from St Paul's Rocks in Mid Atlantic near the Equator and on 

 the American Coast south to Cape San Roque in Brazil, and 

 in Pacific from N. Japan. 



Oceanodroma castro (Harcourt). Madeikan Fork- 

 TAiLLij Petrel. 



Smaller than " leucorrhoa,"^ blacker; tail less forked, white 

 at base; upper tail coverts white with black tips. Wing (^ 150- 

 162, ? 147-159. Tarsus 21-23-5. ^^'^l 13-5-16 (W.). 



Breeds. — Desertas and Porto Santo (Madeira group), Salvage 

 Islands, Azores (Rombos), Cape de Verde Islands and St Helena, 

 also in Pacific. Rare visitor to Coasts of Britain, France, Canary 

 Islands, and coasts of N. America. Birds breeding in Hawaiian 

 Islands and Galapagos Islands have been separated as distinct 

 subspecies, but their status is still doubtful. 



Pelagodroma. 



Tarsus and toes very long and tarsus very little longer 

 than middle toe; tail forked (10-14 ni.m. deep). 



Pelagodroma marina hypoleuca (Webb, Berthelot and 

 Moquin-Tandon). 



^ 9 Above greyish brown, rump and upper tail coverts 

 paler ; forehead, eyebrow and underparts white ; pre-ocular 

 patch and ear coverts blackish grey, basal part of inner web 

 of primaries, under wing coverts and axillaries white, liill, 

 legs and feet black, web between toes yellow with black border. 

 Wing 153-175 (H.). Tarsus 43-44. Bill 16. 



Breeds. — ^Salvage Islands and Cape de Verde Islands. Occurs 

 occasionally on Coasts of Canary Islands, Madeira and Azores ; 

 rare on British and N. American Coasts. 



The typical form " P. marina marina" occurs in S. Seas. 



