12 NORTH AMERICAN BIRDS. 
= 
uniformly gray, the belly more uniform white, and the horn-like process at base of 
upper mandible entirely absent. Young: Similar to winter adult, but white fila- 
mentous feathers of head wanting, and bill smaller and darker in color. Downy 
young : Uniform sooty grayish brown, very similar to corresponding stage of Lunda 
cirrhata, but rather lighter in color and with more slender bill. Length 14.00- 
15.50, wing 7.25, culmen, from cere, or anterior edge of horn, 1.00. Egg 2.70 X 1.82, 
similar in form, color, etc., to those of Lunda and species of Fratercula. Hab. Coasts 
and islands of the North Pacific, from Lower California (resident) to Japan. 
15. C. monocerata (PaLu.). Rhinoceros Auklet. 
Genus PTYCHORAMPHUS Branpr. (Page 9, pl. VI, fig. 3.) 
Species. 
Above uniform slaty blackish, changing gradually into plumbeous on sides of 
head and neck, throat, and fore-neck; a white spot on lower eyelid; lower parts 
white, the sides (beneath wings) plumbeous; length 8.00-9.50, wing 4.75~5.25, cul- 
men.75. Egg 1.83 x 1.34, ovate, pure white. Hab. Pacific coast of North America, 
from Aleutian Islands to Lower California. 
16. P. aleuticus (PaLL.). Cassin’s Auklet. 
Genus CYCLORRHYNCHUS Katp. (Page 9, pl I'V., fig. 5.) 
Species. 
Above uniform blackish slate, beneath white; bill orange-red. MWuptial plu- 
mage: Throat, fore-neck, and sides dusky; a line of narrow pointed white feathers 
starting just below the eye, and extending back across the ear-coverts. Winter 
plumage: Similar to summer dress, but throat, fore-neck, and sides partly or en- 
tirely white; white feathers behind eyes wanting? Young (?): Similar to winter 
adult, but bill duller red (or inclining to brownish), and entire lower parts, including 
throat and fore-neck, continuous white ;' length 9.00-10.40, wing 5.40-6.00, culmen 
about .60. Egg 2.12 x 1.46, clear bluish white. Hab. Coasts of the North Pacific 
from Sitka to the Kurile Islands... 17. C. psittaculus (PaLL.). Paroquet Auklet. 
Genus SIMORHYNCHUS Merrem. (Page 9, pl. IV., figs. 2 to 4.) 
Species. 
Common Cuaracters.—Upper parts blackish, the scapulars sometimes mixed 
with white. Adults with a series of slender, pointed white feathers commencing 
beneath the eye and extending backward across the ear-coverts. ygs ovate, pure 
white, sometimes faintly tinged with bluish. 
a. Wing more than 4.00; adult with a recurved frontal crest ; lower parts uniform 
sooty gray, the belly sometimes whitish ; no white on scapulars. 
1 The seasonal and other changes of plumage in this species are not well understood, and we have not the 
material with which to determine them. The above may, therefore, be not quite correct in some particulars, 
