20 TADORNA CASARCA. 



broad at the base, gradually depressed, of nearly equal 

 breadth throughout ; the upper mandible -with its outline 

 descending and concave, the unguis oblong, much decurved 

 and abrupt at the end, the edges nearly straight, and con- 

 cealing the lamella? ; the nasal sinus moderate, elliptical, 

 sub-basal, close to the ridge ; the lower mandible slightly 

 rearcuate, with the intercrural space very long and narrow, 

 the unguis somewhat elliptical, the tip rounded. 



The nostrils are oblong, a quarter of an inch in length ; 

 the eyes rather small. The legs are short ; the tibia bare for 

 four-twelfths of an inch ; the tarsus short, compressed, 

 covered with small angular scales, and having about twenty 

 anterior scutella. The first toe is very small and elevated, 

 with a small lobifonn membrane, the outer toe nearly as long 

 as the third ; the interdigital membranes a little emarginate. 

 The hind claw is very small and curved ; the outer and inner 

 compressed, the third internally expanded. 



The plumage is full, soft, and blended ; the feathers of 

 the head and upper neck small and oblong. The wings, 

 which have a rounded knob at the flexure, are long, extend, 

 when closed, nearly to the end of the tail, and arc broad and 

 pointed, the second qilill longest ; the secondaries broad and 

 rounded, as are the inner elongated feathers. The tail is 

 rather short, rounded, of fourteen moderately firm rounded 

 feathers. 



The bill is black ; the iris " yellowish-brown," the feet 

 black ; the general colour of the plumage is a light yellowish- 

 red. About the middle of the neck is a narrow ring of green- 

 ish-black, above which the colour of the plumage is chiefly 

 greyish-white. The wing coverts are white ; the primary 

 quills and their coverts black ; the secondary quills deep 

 green, tinged with purple ; but the inner light red on the 

 outer web, and grey on the inner. The hind part of the back 

 and the tail are black, tinged Avith green. 



Length to end of tail 2S inches; wing from flexure 15; 

 tail 5 ; bill along the ridge If ; along the edge of lower man- 

 dible 1^2 ' tarsus 2-fj ; hind toe -fj, its claw j\ ; second toe 

 1^, its claw, jL- ; third toe 2-J^, its claw -^ ; fourth toe 1|^, 

 its claw -^. 



