CHAPTER XXV. 



CANVAS-BACK DUCK (fULIGULA VALISNERIA, STEPHENS ; 

 ANAS VALISNERIA, WILSON). 



\ - ' 



Adult male : Bill as long as the head, deeper 

 than broad at the base, the margms parallel, 

 slightly dilated towards the end, which is rounded, 

 the frontal angles rather narrow and pointed. 



Head rather large, compressed, convex above. 

 Eyes small. Neck of moderate length, rather 

 thick. Body full, depressed. Wings small. Feet 

 very short, strong, jDlaced rather fir behind; tar- 

 sus very short, compressed, anteriorly with narrow 

 scutella continuous with those of the middle toe, 

 and having another series commencing half-way 

 down and continuous with those of the outer toe, 

 tlie rest reticulated with angular scales. Hind 

 toe small, with an inner expanded margin or web ; 

 middle toe nearly double the length of the tar- 

 sus, outer a little shorter. Claws small, com- 

 pressed, that of the first toe very small and 



^4!a 



