342 



ALCIDiE, AUKS. GEN. 322. 



The curious bill is used to 



, ii, 534; Ombria psiltacula 



Sfinorhi/jich us psitlaculus Coues , 



9; wiug 5J; tarsus 1; bill §. N. Pacific, 

 pry opeu bivalve mollusks (^Brandt). Nutt 

 Cass. iuBo., 910 



I. c. 36 ; Elliot, pi. 70. 



PSITTACULA. 



b' 



io' 



322. Genus SIMORHYNCHUS Merrem. 



'/ Crested Auh. Adult in summer: blackish, paler 

 and grayish below. A recur\fed frontal crest of 

 12-20 narrow feathers, dark ; a bundle of lengthened Fro. m. Pan-oquet Auk. 

 filamentous feathers over and behind each eye, white. Bill red, yellow-tipped, 

 with singularly irregular rictus, sides of lower mandible wholly naked, and 

 a horny development at the commissural angle. Phcderis crhtatella Amd., 

 vii, 253, pi. 467 ; Cass, in Bd., 906 ; Slriiorliynchus crislatellus Coues, I. c. 38. 



Fig. 223. Crested Auk ; adult ia summer. 



Fig. 224. Crested Auk ; immature. 



Fig. 223. In winter, bill dark, without the horny plate : Uria dubia Pall. ; 

 Slmorhynchus diibius Coues, I. c. 40. Younger birds with a white spot 

 under the eye, base of lower mandible feathered, gape straighter, and no 

 horny plate at the angle. Aha tetmcula Pall. ; Phaleris tetracida Cass, in 

 Bd., 907 ; Simorhi/nchus tetraculus Coues, I. c. 43 • Elliot, pi. 67. Fig. 224. 

 See Brandt, I. c. 224. All the foregoing stages show the crest, but it is 

 wanting in very young birds. Length about 9 ; wing 5J ; tail IJ ; tarsus under 

 1 ; bill J. N. Pacitic ; not observed in U. S. cristatellus. 

 Whiskered Auk. Similar ; smaller ; two series 



(postocular and maxil- 



lary) of filamentous white 

 feathers on each side of 

 head ; bill smaller, never 

 irregular. Very young : 

 blackish-plumbeous, paler 

 below, no crest, bill dark 

 (^8. cassini Coues, I. c. 

 45; Bd., Tr. Chicago 

 Alca ^yygmma Gm. ?). N. Pacific. Phaleris 

 908 ; 8iinorhynchus camtschaticus Coues, I. c. 



CAMTSCHATICUS. 



Fig. 22!). Whiskered Auk: adult. PiG. 22G. The same, youu, 



Acad, i, 324, pi. 31, f. 2 

 camtschatica Cass, in Bd., 

 41 ; Uria mystacea Pall ; Mormon sujperciliosum Light. 



