Puffinus obscurus (Gmel.), Syst. Nat. i. p. 559 (1788) ; Gould, B. of E. v. pl. 444 ; Audub. B. N. Am. pl. 299 ; Dresser, ix. p. 403, pl. 720 ; Salvin, Cat. B. Br. Mus. xxv. p. 382 ; Lilford, vi. p. 141, pl. 61 ; P. auduboni, Finsch, P.Z.S. 1872, p. 111 ; Ridgway, p. 60 ; P. tene- brosus, Natt. fide Pelz. Ibis, 1873, p. 47 ; Ridgway, p. 60.
Cahow, in Bermuda.
Ad. (Bermudas). Upper parts slaty black ; under parts white extend¬ing to the eye ; feathers on the sides of the head and neck mottled ; under wing-coverts white ; axillaries white slightly marked with slaty black at the tip ; bill blackish plumbeous paler on the lower mandible ; outside of tarsus and the outer toe blackish plumbeous, the rest fleshy yellow ; iris blackish brown. Culmen 1.45, wing 7.0, tail 3.2, tarsus 1.5 inch. Sexes alike.
Hab. The tropical and subtropical seas of the whole world ; the eastern coasts of North America from New Jersey to Florida and formerly in abundance in Bermuda ; of accidental occur¬rence on the coasts of the British Islands.
In habits this Shearwater resembles P. anglorum, and like that species nests in holes in the ground or in rocks, or under projecting rocks, depositing in March a single white egg like that of P. anglorum, but smaller, measuring about 2.05 by 1.40
1175. Puffinus obscurus