cxxvi 
INTRODUCTION. 
Genus Chaulelasmus. 
1 he bird characterized under this term is almost the sole type of the genus 
336. Chaulelasmus strepera 
Gadwall. 
A somewhat rare winter visitant. 
Genus Nyroca. 
Vol. V. PI. XIX. 
In Britain there are two species of this genus ; in North-America there are others, and others again in 
Australia. 
337 . Nyroca ferina Vol. V. PI. XX. 
Pochard. 
A winter visitant, frequently taken in our decoys, and the flesh held in some esteem as representing the 
celebrated Canvas-backed Duck of America. 
338. Nyroca leucophthalmos ......... Vol. V. PI. XXL 
White-eyed or Ferruginous Duck. 
A spring visitor, almost exclusively so in England, but unknown in Ireland. 
Genus Branta. 
A fine form, the native country of which is Eastern Europe and India. 
339. Branta rufina ............ Vol. V. PI. XXII. 
Red-crested Duck. 
Tlie occurrence of this bird in England is very seldom and uncertain ; still there are many British 
specimens extant. 
Subfamily FULIGULINtE. 
The birds of this subfamily, or the Diving Ducks, form an extensive group, members of which are found 
in most parts of the globe, and which is well represented in the British Islands. 
Genus Fuligula. 
340. Fuligula cristata ........... Vol. V. PI. XXIII. 
Tufted Duck. 
A tolerably common winter visitant to the British Islands ; many remain to breed on the lakes at Clumber 
and Osberton in Nottinghamshire, and doubtless on other similar sheets of water. 
