RADJAH. 
more developed towards the tip of the upper mandible ; lower mandible 
with the lamellae not projecting outwardly ; feet flesh-colour ; sexes 
similar. Tadorna. 
Bill not broader towards the tip than at the base ; culmen almost 
straight ; lamellae equally developed along the inner edge of the upper 
mandible ; lamellae on the edge of the lower mandible not projecting 
outwardly ; bill and feet dark ; sexes dissimilar. Cusarca.” 
This quotation well shows the minute differences which have been 
utilised for the differentiation of Anatine genera, and in the present case 
as Casarca has been admitted even by genus-lumpers, I find I must admit 
Radjah. The lamellae on the mandibles more closely approach those of 
Casarca than those of Tadorna, while compared with the type of Tadorna, 
I note Radjah differs in its shorter wing though longer tail, while the bill 
is longer and broader and the legs and feet are stouter. It differs from 
Casarca in almost the same manner, so that its recognition can scarcely be 
denied. While admitting the difference in sex coloration as worthy of note 
in a consideration of generic features I would have ignored the coloration 
of the feet as valueless. 
VOL. IV. 
73 
t 
