Bill strong and moderately long, terminating in a strong, sharp, overhanging hook or nail; nostrils impervious and tubular, opening forward or upward; feet moderate; toes webbed; hind toe small and elevated, rarely absent. Oceanic birds of strong flight and wandering habits; colors black, brown, and white. Eggs white, deposited in burrows or among piles of loose stone; young covered with down and fed for some time before leaving the nest. Families. a1. Smaller; wing less than 150 mm. ... Procellariidæ (p. 84) a2. Larger; wing more than 300 mm. ... Puffinidæ (p. 84) Family PROCELLARIIDÆ. Nasal tube prominent, vertically truncated and with a thin partition. Subfamily PROCELLARIINÆ. Genus Oceanodroma Reichenbach, 1852. Wing less than 180 mm.; tarsus not longer than middle toe with claw; tail emarginate or slightly forked; tarsus less than twice as long as culmen. 74. OCEANODROMA species McGregor. PETREL. Oceanodroma sp. McGregor, Bull. Philippine Mus. (1904), 4, 12; McGregor and Worcester, Hand-List (1906), 19. Luzon (McGregor). The only specimen representing this genus and known to have been taken in the Philippines is in very poor condition and can not be determined specifically. It came aboard ship near Mariveles, Luzon, during a storm on July 28, 1903. Family Puffinidæ. Nasal case low and broad; end of lower mandible hooked like the upper. Subfamily PUFFININÆ. Genus PUFFINUS Brisson, 1760. Nasal tube obliquely truncate, its partition thick. 75. PUFFINUS LEUCOMELAS Temminck. SIEBOLD'S SHEARWATER. Puffinus leucomelas Temminck, Pl. Col. (1836), pl. 587; Ridgway, Man. North Am. Bds. (1887), 62; Salvin, Cat. Birds Brit. Mus. (1896), 25, 370; Sharpe, Hand-List (1899), 1, 123; McGregor and Worcester, Hand-List (1906), 19. 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.) The only record of this species for the Philippine Islands is based on the specimen collected by Cuming. Order LARIFORMES. TERNS AND GULLS.