Subfamily PUFFININÆ.
Genus PUFFINUS Brisson, 1760.

Nasal tube obliquely truncate, its partition thick.

75. PUFFINUS LEUCOMELAS Temminck.
SIEBOLD’S SHEARWATER.

Luzon (Cuming). Japan and Korea south to Australia.

Adult male.—Upper surface brown, feathers of body and wings with paler dusky edges; anterior portion of crown, forehead, sides of head, and neck white, each feather with a dark disk, which is narrow on the forehead and sides of the head and neck, giving a streaked appearance; entire under surface white; under wing-coverts white, interior ones with dark shafts, those near the edge of wing with dark disks; axillars pure white; tail brown, the inner webs of the lateral rectrices near the base white; primaries black throughout. Bill horn-color; feet flesh-color, the outer toe a little darker. Length, about 480; wing, 330; outer rectrices, 102; central rectrices, 142.

Female.—Similar to the male.” (Salvin.)

“Lower parts white; top and sides of head white, spotted and streaked with blackish. Wing, 286 to 318; tail, 149 (graduated for about 46); culmen, 47; tarsus, 47; middle toe with claw, 33.” (Ridgway.)