MONOGRAPH OF THE PETRELS. 



and axillaries, the latter having a slight tinge of rust colour ; lower greater coverts and 

 quill-lining blackish, the latter somewhat ashy-grey ; bill and feet black. Total length, 

 8.4 inches ; culmen, 0.5 ; wing, 6.8 ; tail, 3.3 ; tarsus, 1.2. 



Adult female. Similar to the male. Total length, 8.5 inches ; wing, 7.0 ; 

 tarsus, 1.2. 



The figure in the Plate is drawn from the original type in the Paris Museum, and 

 was kindly lent to Salvin by the authorities of that institution. The descriptions 

 of the birds are taken from a pair from San Benito Island, presented to the British 

 Museum by Mr. A. W. Antho^r. 



26 



