95. Puffinus griseus. 17 inches.

This is a southern species which, after nesting on the islands in the far south during our winter months, comes north and appears off the Pacific coast of the United States during our summer months, as far north as Alaska. They are a dark sooty gray, except for the under-coverts, which are whitish.

Nest.—Habits are the same as the others of the family. The single white egg is laid at the end of the burrows or in crevices under rocks (2.40 × 1.65).

SLENDER-BILLED SHEARWATER.

96. Puffinus tenuirostris. 14 inches.

This is much smaller than the preceding, otherwise resembling it in color and markings, being a little lighter under the throat, and the bill more slender in proportion to the size of the bird. Bill and feet nearly black, as is also the one above.

Nest.—Nesting habits and range of the bird are the same as the [Dark-bodied Shearwater]; it is not found on the N. A. coast as commonly as the other.

FISHER PETREL.

100. Æstrelata fisheri. 7 inches.