SECIDA, = CXKVI. 217 
6. Eyelids with deciduous appendages; no crests; culmen with one curve; 
covering of bill moulted in 7 to 9 pieces. . . . FRATERCULA, 3822. 
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 uearer nostril than tip of bill. 
c. Nostril exposed, overhung by a horny scale (Phalerine); culmen 
straight till near tip, then abruptly decurved. . CrEPPHus, 323, 
cc. Nostril more or less completely concealed by dense velvety feathers. 
(Alcine.) 
d. Bill narrow; neither mandible iene ed; tail rounded, the feathers 
not pofnted. eee ere sy Reman at MIRA Cy bac. 
dd. Bill very deep, much commpneseed: one or hot mandibles grooved 
in adult; tail graduated, its feathers pointed. 
e. Wings well developed; bill (less than 14) much shorter than head. 
ALCA, 325. 
ee. Wings rudimentary, incapable of lacs bill as long as head 
faba SOE Macha » « PLAvutus, 326. 
6b. Bill very short and broad, ‘ne Bugle ‘at mie nearer to tip of bill than to 
nostril; culmen curved. CAG) eiaihe ps te es is, ALGE 327. 
322. FRATERCULA Brisson. (Lat., fraterculus, little brother.) 
634. PF. arctica (L.). Purrin. Grooves of bill oblique, broad 
and distinct. Blackish above; a black band across fore-neck ; 
white below. L.13. B.13. Arctic, 8. to N. J. 
323. CEPPHUS Pallas. (xémos, 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. 
toN.J. (£u.) | 
aa. Greater wing-coverts with at least their basal half black. 
636. C. grylle (L.). Buack GuitiEmotT. Bill larger than in 
C. mandti; size and colors similar. Arctic, 8. to N.J. (£u.) 
(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. GuiLtLtemort. Dusky ; second- 
aries white-tipped; basal part of upper tomium dusky. L. 17. 
W.8. B.18. N. Atl, S. to Mass. (iu.) (“Possibly to Troil, 
the Icelander.”) 
aa. Depth of bill at angle more than $ culmen. 
638. U. lomvia (L.). Tuick-BILLED Murre. Dusky; sec- 
ondaries white-tipped ; basal part of upper tomium thickened and 
light-colored in adult. L.16. W. 84. B.1}. Arctic,S.to N.J. 
(Eu.) (Swedish name.) 
325. ALCA Linnezus. (Lat., from alk or auk.) 
639. A. torda L. Razor-B1tLtED Auk. Black; lower parts 
and tips of secondaries white; snuffy-brown in summer. L. 16}. 
