MONOGRAPH OF THE PETRELS. 



In his original description of the bird, which he named in honour of his colleague 

 Dr. Garnot, Lesson says that it flew in a straight line, skimming the surface of 

 the water, into which it suddenly dropped and dived in search of the small fishes 

 which constitute its food. 



Eleven specimens in the British Museum give the following average dimensions : — 

 Wing, 5.35-5.75 inches ; culmen, .70-85 ; tarsus, 1.2-1.3 ; middle toe and claw, 

 1.45-1.6. 



Adult female. General colour above glossy-black, some of the scapulars ashy- 

 grey or ashy-white, forming an irregular band on each side of the mantle ; wings 

 black ; tail-feathers black, inclining to ashy-brown at the ends ; crown of head, 

 lores, sides of face and ear-coverts black, the latter slightly marked with grey ; cheeks, 

 throat, and under-surface of body pure white ; on the sides of the fore-neck a patch 

 of dark slaty-grey ; sides of body also slaty-grey, varied on the flanks with white 

 bases and tips to the feathers ; under wing-coverts white, dark brown round the 

 edge of the wing ; axillaries slaty-grey like the flanks ; quills dusky below, rather 

 more ashy on the inner web ; " bill black ; tarsi and toes blue-grey in front, black 

 behind ; outer toe and webs black " (M. J. Nicoll). Total length, about 9.0 inches ; 

 culmen, 0.8 ; wing, 5.45 ; tail, 1.45 ; tarsus, 1.3 ; middle toe and claw, 1.5. 



The specimen described is a female from Valparaiso Bay, procured by Mr. M. J. 

 Nicoll. The bird figured was not specified by Salvin, but it must have been one in 

 our collection. 



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