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. Hob. Coasts 

 and islands of the North Pacific, from Lower California (resident) to Japan. 



15. C. monocerata (PALL.). Rhinoceros Auklet. 



GENUS PTYCHORAMPHUS BRANDT. (Page 9, pi. 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 KAUP. (Page 9, pi IV., fig. 5.) 



Species. 



Above uniform blackish slate, beneath white; bill orange-red. Nuptial 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 j 1 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, pi. IV., figs. 2 to 4.) 



Species. 



COMMON CHARACTERS. 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. Eggs ovate, pure 

 white, sometimes faintly tinged with bluish. 



a 1 . 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 hare not the 

 material with which to determine them. The above may, therefore, be not quite correct in some particulars. 



