346 ALCIDE, AUKS.—GEN. 328. 
to dark green; sometimes perfectly plain, usually fantastically streaked or 
blotched in interminably varying pattern. Sw. and Rron., F. B.-A. ii, 
477; Nurr., ii, 526; Aup., vii, 267, pl. 473 ; Uria lomvia and ringvia Cass. 
in Bp., 913, 914; Zomvia troile and L. ringvia Couns, 1. c. 75, 78. 
Pacific specimens have a somewhat differently shaped bill, constituting var. 
californica Bryant, Proc. Bost. Soc. N. 
H. 1861, p. 11; Cougs, /.c.79. TROILE. 
Thick-billed, or Briinnich’s Guillemot. 
Depth of bill at nostrils about 4 the 
length of culmen; tomia of upper man- 
dible at base dilated, denuded, usually 
yellowish. Distribution as in the last 
Fig. 237. Thick-billed Guillewoi. ~~ species. Uria briinichii Sw. and Ricu., 
F. B.-A. ii, 477; Nurr., ii, 529; Aup., vii, 265, pl. 472; U. arra Cass. in 
Bp., 9145): Lomvia-svarbagCouus, Uc. 80... = = mat a eARE AS 
Fic. 238. Murres, 
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