NATATORES: AL 



fined to cold 

 climates. The 

 Genus A lea 

 Auks proper 

 has the bill ra- 

 ther long, flat- 

 tened, slightly 

 resembling a 

 knife-blade in 

 form, grooved 

 upon the sides; 

 the color dark 

 above, white 

 below. 



The Great 

 Auk,* A. im- 



the Arctic re- 

 gions, is about 

 thirty inches 

 long, and the 

 wing five and a 

 half inches ; it 

 is incapable of 



flight. The Razor-billed Auk, A. torda, Linn., of the Arc- 

 tic regions, and southward to New Jersey in winter, is 

 seventeen inches long, the wing eight and a half inches. 



The Genus Aptenodytes comprises the Penguins of the 

 cold regions of the Southern hemisphere. They have 

 the wings very small, are incapable of flight, and go on 

 shore only to lay their eggs. The Great Penguin, A.pata- 

 gonica, Linn., is as large as a goose, slate-color above, 

 white below, with a large black patch in front, surrounded 

 by a yellow band. 



* Professor Steenstrup reports that this bird has become extinct 



