335 
with a slight ocrous tint ; no white spots 
upon the sides of the back ; the speculum 
upon the wing half greyish white and half 
light brown, base of the quill feathers 
brownish white ; beak, legs, and toes red- 
dish brown." 
"The trachea of the male, which is 
broad immediately underneath the upper 
larynx, becomes suddenly very narrow; 
then assuming towards the middle a very 
large diameter, it terminates in narrow 
rings, the lower larynx is formed of two 
dilatations, that on the left, which is the lar- 
gest and most elvated is formed of bony ra- 
mifications, covered by a fine membrane." 
This Duck inhabits the eastern parts of 
Europe. It is a bird of passage on the 
Caspian Sea, in Hungary and Turkey; 
less regular in its passage to the great lakes 
of Switzerland ; is never found upon the 
shores of the Ocean. Its food is shell 
fish and aquatic vegetables. In the sto- 
mach of the one before us, were found the 
seeds of the Ruppa maritima. 
This species according to Pallas inhabits 
the immense lakes in the deserts of Tar- 
