58 NORTH AMERICAN BIRDS. 



Egg 2.83 X 1-91. Hob. Bering's Sea and portions of the North Pa- 

 cific 86c. F. glacialis rodgersii (CAss.). Rodgers's Fulmar. 



a 2 . Bill long and slender, its greatest depth much less than half the total length 

 (measured from frontal feathers) ; nasal tubes separated from the unguis by 

 a space measuring much more than half as much in length as the former. 

 b l . Bill cylindrical at base, or measuring as much in width as in depth ; space 

 between nasal tube and base of unguis about equal to the length of the 

 former; upper parts plain; head white; tail-feathers 14. (Subgenus 

 Priocella HOMBR. & JACQ.). 



Head, neck, and lower parts white ; upper parts pale pearl-gray, the 

 quills darker, with inner webs chiefly white ; length 18.00-18.50, 

 wing 13.00, culmen 1.75-2.10, depth of bill at base .65. Hab. South- 

 ern seas, north along Pacific coast of America to coast of Washing- 

 ton Territory... 87. F. glacialoides (SMITH). Slender-billed Fulmar. 

 >*. Bill compressed, or higher than broad, at base ; space between nasal tube 

 and base of unguis less than the length of the former ; upper parts parti- 

 colored ; head dusky ; tail-feathers 12. (Subgenus Thalassoica EEicn. 1 ) 

 Head and neck sooty grayish, darker on top ; back, scapulars, rump, 

 tip of tail, primary-coverts, lesser wing-coverts, and greater part of 

 primaries, sooty slate ; lower parts, secondaries, greater wing-coverts, 

 inner webs of primaries, tail (except terminal band), and upper tail- 

 coverts, white ; wing 12.50, culmen 1.40. Hab. Antarctic seas. 



F. antarcticus (GMEL.). Antarctic Fulmar. 2 



GENUS PUFFINUS BRISSON. (Page 55, pi. XVI., figs. 3, 4.) 



Species. 



a 1 . Nostrils only partially visible from above, the nasal tubes elevated and inflated 

 anteriorly, where broader than at base; under wing-coverts dusky, and 

 lower parts white. (Subgenus Priofinus HOMBR. & JACQ.) 

 b l . Above ash-gray, more or less tinged with brown, darker on top of head, 

 quills, and tail-feather ; lower parts white, except under wing-coverts 

 and under tail-coverts, which are deep smoky grayish ; bill light yel- 

 lowish, with deep black culmen and nasal tubes, the side of lower man- 

 dible also mostly black ; wing 12.25-13.50, culmen 1.75-1.85, depth of 

 bill in front of nostril .50-.55, tarsus 2.25-2.30, middle toe, with claw, 

 2.90. Hob. South Pacific, north, casually, to coast of California. 



97. P. cinereus (GMEL.). Black-tailed Shearwater. 



6 2 . Above brown, the upper tail-coverts tipped with white; wings and tail 

 blackish ; lower parts white, including under wing-coverts and tail- 

 coverts ; bill yellowish, passing into dusky at tip ; wing 15.00, tarsus 

 2.35, middle toe, with claw, 3.15. Hob. Antarctic seas. 



P. gelidus (GMEL.). Ice Petrel. 3 



1 Thalassoica REICH., Syst. Av. 1852, p. iv. Type, Procellaria antarctica GMEL. 



2 Procellaria antarctica GMEL., S. N. i. pt. ii. 1788, 565. Thallasoica antarctica REICH., Syst. Av. 1852, p. iv. 

 1 Procellaria gelida GHEL., S. N. i. 1788, 564. 



