ALC.E— Ai.cim: 311 



Uria troille troille (L.)- Guillemot. Fr. r'.uiUcmot 

 Iroile ; Gcr. Diinimc; Liiinmc ; Hal. Uria ; SiveiL Sill-grisla. 



^ 9 summer. Above blackish grey, head, throat, and forc- 

 ncck browner, ahnost cliocolate brown ; a crease in feathers from 

 bill to eye and continued behind eye ; secondaries with narrow 

 white tips ; beneath white. In winter, above black, sides of head 

 (except post-ocular stripe), throat and underparts white. Bill 

 black. Legs and feet light brown in front, blackish behind, 

 webs black. Wing 190-207. Tarsus 34-38. Bill 40-48. 



Jirecds. — Dear Island, Iceland, Faroes, British Isles, Murnian 

 Coast, Norway, Gothland, Bornholm, Heligoland, N.W. Coast 

 France, Portugal (Berlengas) ; also on American side of Atlantic, 

 S. Greenland to Newfoundland. Wanders south in winter as far 

 as 30° N., and also enters the Mediterranean. A variety occurs 

 with the crease behind eye white and eye-rim white, known as 

 " U. ringvia," Bridled Guillemot. 



Uria lorn via lomvia (L.). Brunnich's Guillemot. 



(^9 summer. Above darker than in "U. troille"; crown 

 black, contrasting with brown face. liill shorter, upper mandible 

 somewhat swollen at sides behind the nostril, and unfcathcred 

 part there more extensive than in "troille," bare bill behind 

 nostril being about equal in length to bill in front. Bill black 

 tinged greenish, yellowish at tip and on upper mandible near gape. 

 Legs and feet grey black, tinged yellowish in front. In winter, 

 plumage changes as in " troille." Wing 202-222. Tarsus 33-36. 

 r.ill 30-35. 



llreeds. — Iceland (Mevenklint and Graemsay), Bear Island, 

 Jan Mayen, Spitzbergen, Franz Joseph Land, Murman Coast, 

 Nova Zembla ; also on Taimyr Peninsula and on American Coast 

 from N. Greenland south to Labrador. Largely resident ; some- 

 times appears in small numbers on Norwegian and liritish Coasts 

 (rarely) and in Baltic, as well as on the western side of Atlantic. 



Uria grylle grylle (L.). Black Guillemot. Gcr. 

 Gryllteist ; Siued. Tobis-grisla. 



$ 9 summer. General colour oily greenish black ; quills at 

 base of inner webs, median wing coverts, terminal half of greater 

 wing coverts, under wing coverts and axillaries white. Bill 

 black. Legs and feet roral red. In winter (except in very old 



