NATATORES. 



HOOPER. 



187 



ANATIDJE. 



THE HOOPER, 



ELK, OR WHISTLING SWAN. 



A nas cygnus^ Wild Swan, 



ferus, 



Cygnus ferus, 



A nas cygnus, 

 Cygnus musicus, 



Cygnus ferus. 



PENN. Brit. Zool. vol. ii. p. 218. 



MONTAGU, Ornith. Diet. 



BEWICK, Brit. Birds, vol. ii. p. 281. 



FLEM. Brit. An. p. 126. 



SELBY, Brit. Ornith. vol. ii. p. 278. 

 JENYNS, Brit. Vert. p. 227. 



GOULD, Birds of Europe, pt. xv. 



Cygne sauvage, TEMM. Man. d'Ornith. t. ii. p. 828. 



r> n pt. IV. p. 526. 



Whistling 



CYGNUS. Generic Characters. Beak of equal breadth throughout its length ; 

 higher than wide at the base ; depressed at the point ; both mandibles furnished 

 along the sides with transverse serrated lamellae. Nostrils oblong, lateral, near 



