GEN. 247-250 OF KEY. 
477. CYGNUS AMERICANUS SHARPLEss. 
Whistling Swan. 
478. ANSER ALBIFRONS Gum., 
var. GAMBELI (Hartl.) Cs. 
American White-fronted Goose. 
479? ANSER CAIRULESCENS L. 
Blue Goose. 
480. ANSER HYPERBOREUS Patt. 
Smow Goose. 
480a. ANSER HYPERBOREHUS Patt., 
var. ALBATUS (Cass.) Cs. 
Lesser Snow Goose. 
481. ANSER ROSSII Bp. 
Boss’ Goose. 
482. PHILACTE CANAGICA (SeEvast.) Bann. 
Painted Goose. 
[483.] BRANTA LEUCOPSIS (1.). 
Barnacie Goose. 
484. BRANTA BERNICLA (1.). 
Brant Goose. 
485. BRANTA CANADENSIS (1.). 
Canada Goose; Wild Goose. 
485a. BRANTA CANADENSIS (L.), 
var. LEUCOPAREIA (Brandt) Cs. 
White-collared Goose. 
485b. BRANTA CANADENSIS (1.), 
var. HUTCHINSIL (Rich.) Cs. 
Hutchins’ Goose. 
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