494 



THE DIVING BIRDS — PYGOPODES. 



Four eggs, selected In* Dr. Bryant as eharacteristic of their general size and shajie, 

 MU'iisure 2.24 by 1.42 inches; 2.1(5 by 1.50; 2.01 by 1.4G; 2.28 by 1.51. 



The Smithsonian Institution has eggs of tliis species fmni the l>ay of Fundy, Gidf 

 of St. Lawrence, and Newfoundland. In some the ground-color is a glaucous-white; 

 in others a deep buff ; the markings are of a rich brown iuteusilied into blackness. 

 Their average size is 2.30 by 1.85 inches. 



Cepphus columba 



THE PIGEON GUILLEMOT. 



Ui'ia grylte, §, Lath. liid. Orn. II. 1700, 797. 



Cfpphus columhu, Pam,. Zoog. l!osso-As. II. 1820, 348 (I'iiit). 



Uria cohimba. Keys. & Hi.as. Wiib. Kur. 1840, ]>. .veil. — Cans. I'. S. Kxiil. Exj). Orn. 1858, 346, \\. 



38, fig. 1 ; ill IJaii-a's I!. N. Am. 18,")8, !>1'2 ; id. ISiiO, \\\. W, lig. 1. -- IJaiiid, Cat. X. Am. B. 



18,"i9, no. 727. — CocEs, Key, 1S72, 345; Check List, 1873, no. 032; 2d eil. 1882, no. 872.— 



KiDGW. Nom. N. Am. B. 1881, no. 701. 



Hab. Coasts and islands of the North Pacilic, from Southern L'alifornia (lirei'ding) to Aleutian 

 Islands, and acro.ss to Kaiiitscliatl--a; tlieiicu southward to Northern Japan. Wholly replaced north 

 of Behring's Straits by C. MamUii. 



-c 



C. coluinbd, Slimmer dress. 



Sp. Char. Similar to C. gr>jUe, but the bill stouter and more obtuse at the tip, the undei 

 surface of the wings without any distinct white, and with tl-.e white patch on outer surface of the 



Downy young. 



Summer luliilt. 



wings divided for the lower half by a Mack V-shnpefl bar. Adult, in summer : Uniform sooty 

 slate-black, slightly glossed with " invisible " green ; wing with two white patches, one covering 



