(2197) Puffinus tenuirostris tenuirostris.
THE Slender-billed Petrel,
Puffinus tenuirostris Temm., Pl. Col., 99 e livr., v, p. 387 (1835) (Japan).
Vernacular names. None recorded.
Description. Whole upper plumage sooty brown-black, the crown and primaries practically black; the former with paler inner webs, narrowly edged whitish ; secondaries tinged with grey; feathers of the back with faintly paler edges; lower plumage rather paler, greyer brown, the chin and throat very grey-
Colours of soft parts. Iris brown; bill dark slate; legs and feet slate (Tregellas). Bill dark brown; tarsi outside and outer toe dark brown, inside of tarsus and inner toes light drab (Scott).
Measurements. Wing 258 to 280 mm.: tail 80 to 85 mm.; tarsus 49 to 52 mm.; culmen 31 to 34 mm.
Nestling in down. Brown, paler on the underparts.
Distribution. Japan Seas, Bearing Straits and West Australia. Once obtained on the Mekran coast by Mr. Walter Scott, of the Indian Telegraph Service at Omara.
Nidification. None recorded.
Habits. Those of the genus.