THE CANVASS-BACKED DUCK. No game 1s more highly valued by sportsmen than the Canvass-Backed Duck. Its flesh is esteemed a great delicacy, and they frequently sell for two dollars a pair. About the middle of October, vast flocks of them visit Delaware and Chesapeake Bays, and the numerous streams that run into those bodies of water. Their prin- cipal food is a kind of sea-wrack, known as eel-grass, and the insects and shell-fish to be found along the shores. On their arrival the Canvass-Backs are lean, but by the beginning of N ovember, they are in good order for the table. They are ex- (94)