AL CIDJE — PHA LEBIBINJE : A UKS. 



807 



flanks sooty brownish-black, grayer below than above ; other inuler parts white ; lining of 

 wings dark. Feet dull greenish or yellowish, darker behind and below. Length about 9.00; 

 wing 5.40-5.75; tail 1.55; tarsus about 1.00; middle toe alone 1.10; chord of culnien or 

 gonys0.60; gape 1.00; depth of bill 0.1-5 ; width 0.30. Young: Xo wliite filamentous feath- 

 ers on head ; a white spot on lower eyelid; upper 



parts as bef >re, under parts white, marbled and — — ^ 



inottleil with dusky ends of the feathers. N. "^ ~^'^^^E^ 



Pacific and p(dar seas, highly arctic, a])parently 

 not coming much south. This quaintly-beaked 

 bird resorts to clilfs and crags to breed, laying its 

 single egg deep in the cavities of the most inac- 

 cessible rocks overhanging the sea ; it reseudjles 

 a small narrow hen's egg, being white, varioush 

 soiled and discolored, minutely granular and rougli 

 to the touch, 2.35 to 2.35 long by 1.45 to 1.50. 

 :859. S, cristatel'lus. (Lat. cristatelluf; , dimin. of 

 cristatuf;, aresici\. Figs. 540, 541, 542.) Crested 

 Auk. Snub-nosed Auk. Bill fundamentalh 

 small and simjde, couijiressed-conic, with conve\ 

 culmen and little sinuate horizontal commissure 

 but in the breeding season developing several 

 corneous appendages, which alter its shape great- 

 ly, make it singularly irregular, and modify even 

 the outline of the feathers at its base. These 

 accessory pieces are : a nasal plate, filling th„ 

 nasal fossa, separate from its fellow of the oppo- 

 site side ; a subnasal strip prolonged on the cutting 

 edge of the upper mandibles backward from the nostrils; a rosette-like plate at base of upper 

 mandible just over angle of the mouth ; a large .shoe encasing the posterior part of the under 

 mandible ; the latter single, the other three pieces in pairs, making seven in all which are 

 moulted; all those elements vermilion or coral-red; end of the bill enamel-yellow. (Before 

 .acquiring these growths the young bird is tetraculiis of authors ; the adult in winter, after 



Fig. .540. — Crcsteil Auk, reclticej. 

 H. "W. EllioK.) 



(Ad. iiat. del 



Tig 541. — Crested Auk, in eummer, nat. size. Fig. 542. —Crested Auk, in winter, nat, size. 



■shedding them, is dubius.) A beautiful crest of 12-20 slender feathers springing from the fore- 

 head, curling over forward in arc of a circle to fall gracefully upon the bill ; this helmet is 

 'bUckish ; at full length about 2 inches long ; the feathers are not filamentous, but have well- 

 ijrmed webs, and are bundled or impacted together, owing to the oblique divergence of the 



