68 NORTH AMERICAS BIRDS. 



Egg 2.83 X 101. Hah. Bering's Sea and portions of the North Pa- 



cifie 86c. F. glacialis rodgersii (Cass). Eodgers's Fulmar. 



«^ 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, 

 i'. 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 Hombk. & Jacq.). 

 Ilead, neck, and lower parts white ; upper parts pale pcarl-graj', 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. Ilab. South- 

 ei-n seas, north along Pacific coast of America to coast of Washing- 

 ton Territorj'... 87. F. glacialoides (Smith). Slender-billed Fulmar. 

 I'. Bill compressed, or higher than broad, at base; space i)etwcen nasal tube 

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

 colored ; head dusky ; tail-feathers 12. (Subgenus Thalassoica Eeich.') 

 Head and neck sootj- grajish, darker on top ; back, scapulars, rump, 

 tip of tail, pi'imary-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. Hah. Antarctic seas. 



F. antarcticus (Gmel.). Antarctic Fulmar.' 



Genus PUFFINUS Brisson. (Page 55, pi. XVI., figs. 3, 4.) 

 Species, 

 a}. 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 Priofimts Uombr. & Jacq.) 

 6'. Above ash-graj', 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 graj-ish ; 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. Hah. South Pacific, north, casually-, to coast of California. 



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

 6'. Above brown, the upper tail-coverts tipped with white; wings ami 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. Hah. Antarctic seas. 



P. gelidus (Gmel.). Ice Petrel.' 



1 Thalniaoica Reich., Syst. Av. 1S52, p. iv. Type, Proccllnrin antnrctird Omel. 



' Prnccllarin nnlarcllr-i Gmki.., S. X. i. pt. ii. 1788, 565. Tliullatoica aulaictica Reicb., Syst. At. 1852, p. iv. 



• Proccllnria gcUda Gmel., S. N. i. 17SS, 661. 



