i 7 8 



Geese of Europe and Asia 



38 mm. (=1.50 in.), the intermandibular space is occupied by very hard smooth skin, 

 having the appearance of a black horny plate. It would be very desirable to know what 

 this skin is like in the living bird, and whether it is really horn. Generally the structure 

 of the bill in the swan-goose is nearer that of swans than is that of other geese. Legs and 

 feet orange, brighter or lighter in tint. Iris red-brown. 



Total length 



Wing 



Tail 



Culmen . 



Bill from gape 



Tarsus 



Median digit with claw 



Breadth of bill at base 



875-915 mm. ( = 34.4-36 in.). 

 445-460 mm. (= 1 7.50-1 8. 10 in.). 

 140-152 mm. (= 5.50-5.90 in.). 

 87-98 mm. ( = 3.42-3.80 in.). 

 75-83 mm. ( = 2.95-3.60 in.). 

 80-82 mm. ( = 3.14-3.22 in.). 

 80-90 mm. (= 3.14-3.54 in.). 

 27-30 mm. (= 1-1.18 in.). 



Adult Female 



Generally resembling male, but inferior in size. Swelling on base of upper 

 mandible absent, and white feathering along base of bill considerably narrower, and 

 at places even interrupted. White patch on apex of chin almost non-existent. I have, 

 however, seen too few females to be sure that all these characters are constant. For this 

 reason, and because I may possibly have mistaken young males for females, I prefer to 

 give the dimensions of females according to Messrs. Radde and Schrenck. 



Length 



. . . 



• • 31Г 



Wing . 



.... 



15" 10" 



Tail . 



.... 



4 " 10'" 



Culmen 



. . , . • 



2" IO W 



Depth of bill at base 



1" 3'" 



Tarsus 



. . . 



2" 9"' 



Median 



digit 



2" 1 1'" 



Claw . 



. 



6'" 



(Radde.) 



Wing . 



.... 



16" 6'" 



Tail . 



.... 



. . 5" 7'" 



Bill . 



.... 



3" 3'" 



Depth of bill at base 



i" 2'" 



Breadth 



of bill at base . 



■ ■ 9'" 



Tarsus . 



, , г , 



2" i\'" 



Median 



digit 



2" ib£ w 



Claw . 



. 



,1»' 



(Schrenck.) 



Young Bird (in First Plumage) 1 



Bill smaller ; white of cheeks and throat without admixture of brownish. A white 

 (or rusty white) streak on feathering at base of bill absent. Feet in living bird dingy 

 yellow with blackish webs. 



Wing ..... 



1 3" 3'" 



Tail 



4" 3'" 



Culmen .... 



2" 6'" 



Depth of bill at base 



1" 1"' 



Breadth of bill at base . 



8'" 



Tarsus .... 



2" 9'" 



Median digit without claw 



2" 9'" 



Claw of median digit 





The young in down appear to be unknown 



(Schrenck.) 



1 Schrenck, Vog. Amur.-L.^ pi. xv. fig. 2. 



