MONOGRAPH OF THE PETRELS. 



and primaries also black, with concealed white bases, the primaries edged with white 

 along the inner web ; bill entirely black ; tarsus and basal half of toes flesh-colour ; 

 tarsus dusky at base ; distal half of toes and outside of outer toe blackish. Total length 

 about 12.5 inches ; culmen, 1.05 ; wing, 11.0 ; tail, 4.5 ; tarsus, 1.35 ; middle toe and 

 claw, 1.75. 



My description is taken from the type in the Rothschild Collection. 



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