476 



NATATORES. 



ALCAM. 



ALCADJi. 



THE RAZOR-BILL. 



Alca torda. 

 Alca torda, The Razor-bill Auk, PENN. Brit. Zool. vol. ii. p. 148. 



pica, 

 torda, 

 pica, 

 torda, 



Black-billed 

 Razor-bill, 

 Black-Ulled 

 Razor-bill, 

 Slack-billed 

 Razor-bill, 



P. 150. 

 MONTAGU, Ornith. Diet. 



BEWICK, Brit. Birds, vol. ii. p. 176. 



P- 1 " 9 - 



FLEM. Brit. An. p. 130. 

 Auk, SELBY, Brit. Ornith. vol. ii. p. 435. 

 JENYNS, Brit. Yert. p. 260. 



billed Auk, GOULD, Birds of Europe. 

 Pinyouin macroptere, TEMM. Man. d'Ornith. vol. ii. p. 936. 



ALCA. Generic Characters. Rift straight, large, compressed, very much 

 curved towards the point, basal half of both mandibles covered with 



