616 CLASS AVES. 



Duck, Lewin, Brit. Birds, vii., t. 224. — Black and 

 White Pochard, Steph., Anas Bicolor, Vieill. South 

 America. — Gmelln Duck, Lath. — Anas Gmelini, 

 Gmel. Caspian Seas. — New Zealand Duck, Anas 

 Novce Zealandice, Gmel. New Zealand. — Anas Vir- 

 gata, Pr. Max. Trav. ij. 113. Brazils, — and Anas 

 Punctata, Burchel, Trav. 1811. 



The ducks of the second division (for which Prince 

 Chas. Bonaparte reserves the name of Anas) have 

 no membrane to the edge of the thumb. Their head 

 and feet are smaller, their neck is longer, the biU 

 more equal, and the body less thick ; they walk 

 better, and feed on aquatic plants and their fruits, 

 as well as on fish and other animals. It appears that 

 the enlargements of their trachea are of an homo- 

 geneous, bony, and cartilaginous substance. 



Among these also some subdivisions may be esta- 

 bhshed. 



The SoucHETs, Rhynchaspis, Leach, 



Are very remarkable for their long bill, whose upper 

 mandible, bent into a perfect semicylinder, is en- 

 larged at the end. The cilia on the sides of it are so 

 long and so slender, that they look like lashes. These 

 birds live on worms, which they seek on the banks 

 of rivers. 



The genus Clypeata, Lesson, and Spatula, Boie. 

 Shoveler. An. Clypeatciy L. Enl. 971, 972, Frisch. 



