MONOGRAPH OF THE PETRELS. 



lateral tail-feathers is wholly pure white, the outer weh also white, with grey bars. 

 Notwithstanding the much paler coloration of the upper-parts, however, the soft 

 brownish-grey of the under-parts is quite as dark in CE. fisheri as in CE. gularis, and 

 occupies just about the same area ; but the well-defined bars on the flanks seen in the 

 latter seem to be quite absent in CE. fisheri." 



The following description is copied from that given by Mr. Ridgway in his 

 " Manual," and was reproduced by Salvin in the " Catalogue of Birds " (p. 415) : — 



" Inner webs of primaries abruptly white for at least the inner half ; wing more 

 than 9 inches. Top of the head white, spotted with greyish. Back and scapulars 

 fine bluish-grey, or plumbeous ; lesser wing-coverts slaty-blackish ; greater and 

 middle coverts slate-grey, broadly margined with white ; tail mostly white, 

 irregularly barred and vermiculated with grey ; lores, cheeks, chin, throat, middle 

 of chest, and under tail-coverts immaculate pure white ; a blackish spot immediately 

 beneath the eye ; sides of the neck and chest densely mottled, and vermiculated 

 with ash-grey and white, but the former prevailing ; lower breast, belly, sides and 

 flanks smoky plumbeous superficially, but the feathers all pure white immediately 

 beneath the surface. Wing, 10.15 inches ; tail, 4.0 (graduated for 0.9) ; culmen, 1.0 ; 

 tarsus, 1.25 ; middle toe with claw, 1.7." 



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