Note CM — {358} CHAP. X.[124] (continued 2)

Mr. Pennant, in treating of the Whistling Swan, takes notice of the formation of the Windpipe; but on examination, the windpipes of both the species which frequent Hudson's Bay are found to be exactly alike, though their note is quite different. The breast-bone of this bird is different from any other I have seen; for instead of being sharp and solid, like that of a goose, it is broad and hollow. Into this cavity the windpipe passes from the valve, and reaching quite down to the abdomen, returns into the chest, and joins the lungs. Neither of the species of Swan that frequent Hudson's Bay are mute: but the note of the larger is much louder and harsher than that of the smaller.