ALCID^ — THE AUKS — CICERONIA. 



507 



tory, and on Shoal-water I5ay. In regard to its breeding-habits and its other specific 

 peculiarities, we have no information. Dr. Suckley only states in regard to it that 

 it is found in sunnner at Tuget Sound; while Dr. Cooper i)resumes that it has about 

 the same range as the liravhyrawiihus marmoratus, and so far as he has observed 

 has similar habits. It is said to be common at Hakodadi iu October. 



Genus CICERONIA, Rkiciiknbacii. 



Ciaroiiia, ISkiciienb. Syst. Avium, 1852, p. iii (tyi)c, PImlcris micruccros, Buandt, = Uria piisilla, 

 Pall.). 



Ciceronia pusilla. 



THE KNOB-BILLED AUK; LEAST ATTK. 



Uria pusilla. Pall. Zoog. Itosso-As. II. 1820, 373, \\. 70 (cxcl. syii.). 



riuilcris pusilla, Cass. Pr. Ac. Nat. Sii. Pliilad. 1862, 324 ; iti Baird's R. N. Am. 1858, 909. — 



Baiiid, Cat. N. Am. B. 1859, no. 723. 

 Simorhyiichiis 2)millus, Coukm, Pr. Ac. Nat. Sei. Philad. 1868, 48, fig. 12, figs. 227, 228 ; Kny, 1872, 



343 ; Check List, 1873, no. 624 ; cd. 2, 1882, no. 861 ; Elliott's Alaska, 187.'), 208. 

 Ciccrmiiii pitsilla, Bidgw. Nom. N. Am. B. ISSl, no. 750. 



J'hiilcris corm'culatn, E.suiiscil. Zool. Atl. IV. 1831, 4, pi. 16 (= summer adult). 

 Pluilcris mieroccros, Bkandt, Bull. Ac. St. Petersb. II. 1837, 346 (= summer adult). —Cass, iu 



Baird's B. N. Am. 1858, 908.— liAnii), Cat. N. Am. B. 1859, no. 722. 

 Simorliynclms microcero.i, CoUKs, I'r. Philad. Acad. 1868, 46, fig. 11. 



r/uilcris pijgmcm, Bua.niit, Bull. Ac. St. Petersb. II. 1837, 347 {mt Alca i)ygtnK<i; G.mel. 1788). 

 I'halcris nodiroslm, BoxAi'. Comp. List, 1838, 06 (=summer adult). — Aui>. Orn. Biog. V. 1839, 



101, pL 402 i B. Am. VII. 1844, pi. 408. 



IlAn. Coasts and islands of the North Pacific, south to Japan and Sitka, north to the Prybilof 

 Group. 



Sp. Chau. Adult, hrcuUwj-plumagf : Bill very .short, thu depth ami width through the base 

 about eijual to the length of tiie cuhneii, wliich is decidedly arched ; gouys slightly convex ; top 

 of the cere furnished with a small semicircular compressed tubercle. Ui)per parts almost wholly 

 deep slate-black, inclining to glossy black in some specimens ; inner scapulars usually white, form- 



m 



.70; 



Summer adult. 



Winter adult. 



ing more or less of a longitudinal patch on each side of the back ; inner greater coverts and secon- 

 daries also usually tippeil with white. Forehead and lores more or less conspicuously ornamented 

 with delicate acuminate white feathers, a few of which, narrower and more thread-like, extend 

 backward in u narrow streak from the rictus across the cheeks, while a more conspicuous line of 



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