204 ANATID^E. 



The second species of North American Swan was de- 

 scribed by Dr. Sharpless, in the fifth volume of the Ame- 

 rican Journal of Science and Arts, under the name of 

 Cygnus Americanus ; it has also been described more re- 

 cently by Mr. Audubon, in the fifth volume of his Orni- 

 thological Biography. I have been presented by both 

 these gentlemen with the organ of voice and the sternum 

 from several examples of this second species of American 

 Swan, which, however, in some respects, internally as well 

 as externally, resembling our Bewick's Swan, is said to 

 attain a size and weight almost equal to those of our Hoo- 

 per ; the whole length is recorded as reaching four feet 

 six inches, and the weight twenty-one pounds. 



The anatomical representations of Bewick's Swan, ne- 

 cessarily very much reduced in size here, will be found 

 of much larger dimensions in the sixteenth volume of the 

 Linnean Transactions. 



