16. CASSIN AUKLET. _Ptychoramphus aleuticus._ Range.--Pacific Coast from Alaska to Lower California, breeding nearly throughout its range. A plain appearing bird about 9 in. in length, with blackish upperparts relieved only by a white spot over the eye; breast and throat gray and belly white. This Auklet is fairly abundant on the Farallones, breeding on the lower portions of the island. The late Mr. C. Barlow says that it is found in deserted rabbit burrows and in all probability often excavates its own burrows. It also nests among the cliffs placing its eggs among the rocks in any crevice or tunnel which may offer a dark retreat during the day for they are nocturnal in their habits. The single egg which they lay is dull white in color, the inside of the shell being a pale green, which color can only be seen by holding the egg to the light. They are generally slightly nest stained. Size 1.80 × 1.30. Data.--Coronado Islands, Cal., March 23, 1897. Single egg laid on the bare ground at end of a burrow three and one-half feet long. Collector, E. A. Shives. [Illustration 026: Horned Puffin. Rhinoceros Auklet. Cassin Auklet.] [Illustration: White.] [Illustration: left hand margin.] [Illustration: RHINOCEROS AUKLET. Color white, sometimes heavily blotched, as above, and again unspotted.] Page 25 17. PAROQUET AUKLET.--_Phaleris psittacula._ Range.--The Alaskan Coast, casually farther south in winter. This bird is about the same size as the preceding, and the plumage is similar, except that it has no white spot over the eye, and the breast is white. It also has a slender plume extending from back of the eye. The bill is very peculiar, being quite deep and rounded and having an upward tendency. It is orange red in color. They breed very commonly on the islands of Bering Strait. Their eggs are laid in the crevices of the cliff, often several feet in and by a crooked path so that it is impossible to reach them. The single chalky white egg is laid in May. Size 2.30 × 1.45. Data.--Rocky Islet in the Aleutians, June 22, 1890. Single egg laid on bare rock in a deep crevice. Collector, Capt. S. Wilson. 18. CRESTED AUKLET. _Aethia cristatella._ Range.--Alaska Coast, similar in form and plumage to the latter, except that the whole under parts are gray and it has a crest of recurved feathers. The nesting season begins in May, the birds nesting upon the same islands and in the same kinds of sites as the last species. The single egg is chalky white. Size 2.10 × 1.50. Data.--Unak Is., Alaska, July 1, 1900. Egg laid in a crevice among the rocks. Collector, F. Weston. 19. WHISKERED AUKLET. _Aethia pygmaea._ Range.--The Alaska Coast.