Nest.—On the islands and cliffs of the mainland of the Northern Pacific they nest in large colonies. Every crevice in the rocks having its tenant. They lay but a single white egg on the bare rocks (2.90 × 2.00).

Range.—Northern Pacific, southerly to Lower California.

SLENDER-BILLED FULMAR.

87. Priocella glacialoides. 18 inches.

This species has a paler mantle than others of the family, and the primaries are black.

Range.—Southern seas, appearing on the Pacific coast of the United States in the summer. They probably breed in the far south during our winter, although we have no definite record relative to their nesting habits.

PINK-FOOTED SHEARWATER.

91. Puffinus creatopus. 19 inches.

Very little is known of the breeding habits of this bird. Upper parts and under-tail coverts are a pale brownish color, darkest on the wings; top of head dark, with throat and breast white, with yellowish bill and pink colored feet.