No. 75.] 



23 



ORDER NATATORES. 



FAMILY ALCID^. 



Zooto«Y— Part D. 



Uria geylle, Black Guillemot^ (male.) - - - 278 



FAMILY PROCELLARID^. 

 Thalassidroma wilsoni, Wilson's Petrel. 290 



FAMILY PELECANIDJE. 



Phalacracorax caebo, Cormorant, 292 



Pelecanus fuscus, Brown Pelican. - - - - - 294 



FAMILY ANATIDiE. 



Anser canadensis, Wild Goose. 348 



Cygnus americanus, American Swan* ------ 353 



