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62 



AUKS, MURRES, AND PUFFINS. 



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long distance under water with great rapidity, using their wings as 

 well as their feet, and coining to the surface far beyond gunshot 

 range. 



" The Sea Pigeons are met usually in small flocks of half a dozen 

 or more, and generally feed in the open sea at tiie base of bold clilTs. 

 When on the wing they proceed rapidly and in a straight line, and 

 rarely more than a few feet from the surface of the water. On ap- 

 proaching their nesting-site they rise rather abruptly, and fly directly 

 to their nests" (Chamberlain). 



28* Cepphus mandtii (Lidd.). Manht's GriLLEMor. — Resemblca 

 tlie preceding, but the buses of the greater wing-coverts are white instead of 

 "bluck. 



Range. — ^"Arctic regions of both continents" (A. 0. U.); in America 

 hrceding from Labrador and Hudson Bay northward, migrating southward 

 as far as Massachusetts. 



A'cA^ in crevices and fissures of clitfs and rocky places. Fggs^ two to three, 

 not distinguishable from those of C. grylle., 2"34 x 1-15. 



A more northern species than the preceding, which it doubtless re- 

 sembles in habits. 



30* Uria. troile {Linn.), Miure. Ad. in summer. — Upper parts, 

 wings, tail, and neclt all around, dark sooty brown, bhicker on the back, 

 wings, and tail ; tips of secondaries, breast, and belly white, the sides more 

 or less streaked with blackish. Ad. in winter and Im. — Upper parts, wings, 

 and tail much as in summer; under parts white, the throat more or less 

 washed with sooty brown, the flanks sometimes streaked with brownish, and 

 the feathers of the belly more or less lightly margined with blackisli. L., 

 16'00; W., 8-00; Tar., 1-40; B., 1-75; depth of B. at nostril, -50. 



Jtemarks. — Some specimens have a white ring around the eye and a white 

 Btripe behind it. They have been named r. ringvia (Briimi.), but it is un- 

 certain as to whether the species is a distinct one or is based on a mere varia- 

 tion of plumage. 



liange.—'-'- Coasts and islands of the North Atlantic" (A. O. U.). In North 

 America, breeding from Nova Scotia northward, and migrating southward as 

 far as Massachusetti 



iVV.v/y ill connnu , side by side on the bare ledges of rocky cliffs. Egg., 



one, pynlorm, varying from pale blue or grecnisli blue to whitisli or bufty 

 singularly spotted, .scrawled, or streaked with shades of chocolate, rarely un- 

 marked, 3-25 X 2'00. 



"These birds begin to assemble on their customary clififs in Eng- 

 land early in I\Iay, and crowd together in such numbers that it is not 

 uncommon to see hundreds sitting upon their eggs on the ledge of a 

 rock, all in a line, and nearly touching each other" (Nuttall). 



" The bird usually sits facing the cliflf, holding the egg between her 

 legs, with its point outward ; if robbed, she will lay at least one more, 



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