4S 
FT. IN. ; iN 
Length cevsecereecesvees 4 1 MS Sat iw cmngaateeesne 4 
Wh Ne ors eacae hat oe 7-0 Middle toe ............ 6 
U Eh f RONEN aS SiR Mats, 4 OUT HOR” sos sccasreas 52 
The only specimen of this bird we have seen was shown 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 distinctness from C. Bewickii. 
Cygnus AMETiCANUS ....0eeee ee Sharpless in Siliman’s Journal 
DNITUND ck uk <ioknmsenia ie es aeaens Ditto ditto. 
Cygnus Bewickii .......00+..... Haun. Bo. Am. 2. 465. 
Inhabits North America. ; 
The following is an extract from Dr. Sharpless’s paper above 
quoted. We must not, however, 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. Yarrell’s paper 
on that species, published in the Linnean Transactions, to illustrate 
his on C. Americanus. 
Specific Cuar. Beak black, and semi-cylindrical; sides of the 
base with a small orange or yellow spot; body white; tail feathers, 
twenty ; feet black. 
Ae Bewick. American. 
Weight .... net 24 lbs. ... 183 Ibs. ... 21 Ibs. 
Point of bill to the end of bet 5ft. .. oft. Jin. ... 4ft. 6in. 
edge of doccheuidl 43in. ... Sein. .. 4din. 
eye ss Seep iy et! Reamer ie w- OI. 
occiput ... > V7in. ©... Gin. 0g Woe 
Width of.the beak at the widest part near the point fer 
with wings extended ... ft. 10in... 6ft. lin. ... 7it. 2in. 
Carpus to the end of primaries... 2ft. 1}in... 1ft. 8gin. ... 1ft. 1lin. 
Length of middle toe ... coe, OFM. ses AIM. .. 6in.- 
intestine ... sent. Lott. . auc DOES Qt. sc. Ore eae 
ae breast bone ... wee PRIS Se eee . Ysin, 
Depth of insertion of trachea ... 3in. os O2IN. ... 62in. 
Length of bronchial tubes vac OEMs |. Sace> LOUIS . Ldin. 
Tail feathers in number... PS sce EO 100 BO 
