THE BIRD BOOK 
Horned Puffin 
Rhinoceros Auklet 
Cassin Auklet 
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 
White 
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 noctur- 
nal 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 gen- 
erally slightly nest stained. Size 1.80 x 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. 
RHINOCEROS AUKLET 
Color white, sometimes heavily blotched, 
as above, and again unspotted 
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