CXXVI. 217 



b. Eyelids with deciduous appendages; no crests; culmen with one curve; 



covering of bill moulted in 7 to 9 pieces. . . . FRATERCULA, 322. 



aa. Inner claw similar in size and form to the others ; no rosette at corner of 



mouth. 



b. Bill not very short, the angle of chin much nearer nostril than tip of bill. 



c. Nostril exposed, overhung by a horny scale (Phalerince) ; culmen 



straight till near tip, then abruptly decurved. . CEPPHUS, 323. 



cc. Nostril more or less completely concealed by dense velvety feathers. 



(Alcince.) 

 d. Bill narrow; neither mandible grooved; tail rounded, the feathers 



not pointed URIA, 324. 



dd. Bill very deep, much compressed, one or both mandibles grooved 



in adult; tail graduated, its feathers pointed. 



e. Wings well developed; bill (less than l)much shorter than head. 



ALCA, 325. 

 ee. Wings rudimentary, incapable of flight; bill as long as head 



(about 3) PLAUTUS, 326. 



bb. Bill very short and broad, the angle of chin nearer to tip of bill than to 

 nostril; culmen curved. (Allince) ALLE, 327. 



322. FRATERCULA Brisson. (Lat., fraterculus, little brother.) 



634. F. arctica (L.). PUFFIN. Grooves of bill oblique, broad 

 and distinct. Blackish above ; a black band across fore-neck ; 

 white below. L. 13. B. If. Arctic, S. to JST. J. 



323. CEPPHUS Pallas. (/CCTT<OS, a kind of petrel.) 

 a. Greater wing-coverts white to their extreme base. 



635. C. mandti (Lichtenstein.) Blackish, with large white wing- 

 patch; nearly white in winter. L. 13. W. 7. B. 1. Arctic, S. 

 to N. J. (Eu.) 



aa. Greater wing-coverts with at least their basal half black. 



636. C. grylle (L.). BLACK GUILLEMOT. Bill larger than in 

 C. mandti ; size and colors similar. Arctic, S. to N. J. (.EM.) 

 (Scandinavian name.) 



324. URIA Brisson. (ovpia, a water-bird.) 

 a. Depth of bill at angle of mouth less than culmen. 



637. U. troile (L.). MURRE. GUILLEMOT. Dusky ; second- 

 aries white-tipped; basal part of upper tomium dusky. L. 17. 

 W. 8. B. If. N. Atl., S. to Mass. (Eu.} ("Possibly to Troil, 

 the Icelander.") 



aa. Depth of bill at angle more than J culmen. 



638. U. lomvia (L.). THICK-BILLED MURRE. Dusky; sec- 

 ondaries white-tipped ; basal part of upper tomium thickened and 

 light-colored in adult. L. 16. W. 8. B. If Arctic, S. to N. J. 

 (Eu.) (Swedish name.) 



325. ALCA Linnaeus. (Lat., from alk or auk.) 



639. A. torda L. RAZOR-BILLED AUK. Black; lower parts 

 and tips of secondaries white; snuffy-brown in summer. L. 16^. 



