This is a handsome bird known only from the type specimen taken off Kadiak Island, Alaska, by Mr. Fisher.

LEAST PETREL.

103. Halocyptena microsoma. 5½ inches.

This is the smallest of the family. Their plumage is entirely dark sooty.

Nest.—They have been found breeding on the islands of Lower California, and they probably do on others farther south. The single egg of this bird is white with a wreath of tiny brown specks about the larger end.

FORK-TAILED PETREL.

105. Oceanodroma furcata. 8 inches.

These birds have a plumage of bluish gray, the wings being darker and the under parts lightest.

Nest.—Single egg is laid at the end of a burrow on the ground. Egg white with a fine wreath of purplish black specks about the larger end. Found breeding on the islands of Alaska.