60 NORTH AMERICAN BIRDS. 



f l . Tarsus 1.75, or more. 

 g l . Tail 3.10, or less. 



Above uniform sooty blackish, the head and 

 neck not perceptibly paler; lower tail-coverts 

 mixed white and dusky, in greatly varying 

 ' relative amount; length 13.00-15.00, wing 

 8.50-9.25, tail 2.60-3.10, culmen 1.35-1.40, 

 depth of bill at base .40-.45, tarsus 1.70-1.80, 

 middle toe 1.65-1.70. Downy young: Sooty 

 brownish gray above, grayish white below. 

 Egg 2.36 X 1-62. Hob. Northern Atlantic 

 (chiefly the eastern side) and Mediterranean 



Sea 90. P. puffinus (BRUNN.). Manx 



Shearwater. 

 g*. Tail 3.25, or more. 



Above uniform sooty slate, appreciably paler on 

 head and neck ; lower tail-coverts wholly sooty 

 grayish; length 12.25-15.00, wing 9.00-9.10, 

 tail 3.25-3.80, culmen 1.30-1.40, depth of bill 

 at base .35, tarsus 1.75, middle toe 1.70-1.75. 

 Egg 1.79 X 1-27. Sab. Pacific Ocean, from 



Lower California to New Zealand 93. P. 



gavia (FORST.). Black-vented Shearwater. 

 f\ Tarsus 1.65, or less. 



g l . Lower tail-coverts with more or less of dusky. 



h l . Above uniform sooty black ; white of under side 

 of head extending upward nearly or quite to 

 the eye, sometimes involving part of the lores ; 

 length about 11.00, wing 7.60-8.40, tail 3.50, 

 culmen 1.20-1.25, depth of bill at base .35, 

 tarsus 1.50-1.65, middle toe 1.45-1.60. Egg 

 2.05 X 1-45. Sab. Warmer parts of Atlantic 

 Ocean, north, casually, to coast of New Jer- 

 sey 92. P. auduboni FINSCH. Audubon's 



Shearwater. 



A 2 . Similar in color to P. auduboni, but smaller, the 

 bill shorter and more slender, the wing longer; 

 wing 7.00, tail 3.25, culmen .98, tarsus- 1.44, 

 middle toe 1.42. Sab. Pacific Ocean ? (" King 

 George's Sound" J ). 



P. tenebrosus PELZ. Pelzeln's Shearwater. 2 



1 LATHAM ("Synopsis," iii. pt. ii. p. 417) says "King George's Sound, on the American coast"; but vox 

 PELZELN (Ibis, 1873, p. 47) thinks that this is a mistake, King George's Sound on the west coast of Australia 

 being meant instead. 



8 Pufflnut tenebrosiis PELZ., Ibis, 1873, 47. 



