ALCIDH, AUKS.—GEN. 323, 324, 325. 343 
Finob-billed, or Least Auk. Very small; under 7; wing 4 or less; tarsus 
3; bill 2. No crest, but white hair-like feathers on forehead and often about 
eyes. Blackish, with eas 
more or less white on Fi @ 
scapulars; below white, 
pure or much varied with 
dusky; bill of adult in ASS fix 
summer with a little == 
knob at base. N. Pacific. 
Phaleris nodirostris Fic. 227. Knob-billed Auk: adult. Fic. 228. The same, young. 
AwD. vii, 255; pl. 468; P. microceros BranpT ; Cass. in Bp., 908 ; S. micro- 
ceros Cours, J. c. 46. Uria pusilla Pati; P. pusilla Cass. in Bp., 909; 8. 
pusillus Exu., pl. 68 ; Couss, /. c. 49 (young or winter specimens). PUSILLUS. 
323. Genus PTYCHORHAMPHUS Brandt. 
Aleutian Auk. Blackish-cinereous, paler below, white on breast and 
belly; no long feathers about head; bill conic, acute, about 3 the head, 
wrinkled at base, nostrils scaled; 9; wing 5; tarsus 1; bill 3, 2 deep at 
base, $ wide. Pacific Coast to L. Cala. Cass. in Bpo., 910; Exxior, pl. 
69; Cours, J. c. 52. Mergulus cassini GAMBEL. . . . . ALEUTICUS. 
S 324. Genus MERGULUS Auctorum. 
Sea Dove, or Dovekie. Glossy blue-black, 
below from the breast (in winter, and in young, 
from the bill) white; scapulars white-striped ; 
: secondaries white-tipped ; white speck over eye ; 
ee ae oe: bill black, short, obtuse, turgid. 83; wing 43; 
tarsus 4; bill $, about 4 deep or wide at base. N. Atlantic, abundant, S. 
in winter to New Jersey (to Florida, Maynard). Wruts., ix, 94, pl. 74, f. 
a; Nort; i; 095 Aup., vil, 257, ‘pl. 469; Cass. in\Bp., 918... anne. 
325. Genus SYNTHLIBORHAMPHUS Brandt. © 
*.* Tarsi much compressed, broadly scutellate in 
front and on the sides, not shorter than middle toe 
without its claw; bill compressed, shorter than head or 
tarsus; nostrils broadly oval, reached by feathers. 7 
Y ss Fia. 230. Black-throated 
Length 93-11 ; extent 161-181; wing 5-51; tail12; bill Guillemot. 
2-$; tarsus 1. Head and neck black or blackish, with white stripe over eye 
and numerous others on nape and side of neck; upper parts and sides under the 
wings black or blackish-plumbeous; other under parts white, from the throat in 
summer, from the bill in winter, and in young birds. 
Black-throated Guillemot. Not crested. White superciliary stripe not 
running in advance of the eye. Bill stout, obtuse, at base 4 or more of the 
length of culmen, pale, culmen and base black. N. Pacifie. Uvria senicula 
Pati. Mergulus cirrhocephalus Vicors. Uria antiqua Aup., vii, 263, pl. 
