WILSON’S PETREL 543 
Adult winter, male and female.—Similar to the nuptial 
plunage. 
Immature, male and female. — Resembles the nuptial 
plumage. 
Brak. Black. 
FEET. Black. 
IRIDES. Brown. 
Kea. ‘ Exactly lke the egg of Leach’s Petrel, white, 
with an indistinct zone of light red, and faint purplish under- 
lying dots round the larger end” (Ogilvie-Grant, ‘Ibis,’ 1896, 
p. 54) : clutch, one. 
AVERAGE MEASUREMENTS. 
TOTAL LENGTH ... .. ¢€ in. Female larger. 
WING ee ee eiyiee hao inl Caras 
BEAK ee ae ores ae 
'TARSO-METATARSUS er ORS 
Eae es poe ee es Se 96. ami, 
Allied Species and Representative Forms.—The follow- 
ing list of Petrels with forked tails, which speaking gener- 
ally are inhabitants of some part or other of the Pacific 
Oceans may here be included :—O. macrodactyla ; O. socor- 
rensis; O. fuliginosa; O. melania; O. markhami ; O. 
tristramt; O. homochroa ; O. monorhis ; O. hornbyt ; and 
O. furcata. 
