99 



CYGNUS AMERICANUS. 



Cyg. — Cygno Bewickii similis, seel majore. 



AMERICAN SWAN. 



Swan like Cygiius Bewickii, but larger. 



Length . . . 

 Ext. Alee. 

 Bill 



4 

 7 



1 







4 



Tarsi 4 



Outer toe 5| 



Middle toe ... . 6 



The only specimen of this bird we have seen was shewn to us by Mr. Audubon ; it appeared 

 to have the bill more expanded towards the tip than is the case in Cygnus Bewickii, and altogether 

 to be of larger size. The Prince of Musignano assures us that he is quite satisfied as to its distinct- 

 ness from C. Bewickii. 



Cygnus Americanus Sharpless in Silliman's Journal. 



Trachea Ditto ditto. 



Cygnus Bewickii Faun. Bo. Am. 1. 465. 



Inhabits North America. 



The following is an extract from Dr. Sharpless's paper above quoted. We must not, how- 

 ever, forget to mention that the tracheal anatomy of this species is so very similar to that of 

 C. Bewickii, that Dr. Sharpless has copied the illustrations of Mr. Yarreii's paper on that species, 

 published in the Linntean Transactions, to illustrate his on C. Americanus. 



Specific Char. Beak black and semi-cylindrical; sides of the base with a small orange or 

 yellow spot ; body white ; tail feathers twenty ; feet black. 



Weight 



Point of bill to the end of tail .... 



edge of forehead 



eye 



occiput 



Width of the beak at the widest part near the point 



with wings extended 



Carpus to the end of primaries .... 



Length of middle toe 



intestine 



breast bone 



Depth of insertion of trachea 

 Length of bronchial tubes 

 Tail leathers in number 



Hooper. 



Bewick. 



American. 



24 lbs. .. 



13|lbs. . 



. 21 lbs. 



5ft. 



3ft, 9in. . 



. 4ft. 6in. 



4^in. 



3iin. 



. 4lin. 



5[in. .. 



4^in 



5in. 



7|in. . . 



Glin. 



. 7iin. 



J Uin. 

 Jl|in. 



7ft. lOin. . 



6ft. lin. . 



. 7ft. 2in. 



2ft. ljin. . 



1ft. Rlin. . 



. 1ft. llin. 



G!in. . 



5jin. 



(iin. 



12ft. 



10ft. 2in. . 



. 10ft. 7in. 



Hlin. .. 



6§in. 



. 71in. 



3in. 



Oj'in. 



. 6Jin. 



3Jin. .. 



Uin. 



. 1 lin. 



20 



18 



. 20 



