ANSER. <Auct. 
Anas. Linn. — 
 Typr. Anser ferus. 
_ Affinities. Some of the species of this genus approach near the 
swans, as Anser Canadenses, while others present an affinity to the 
Bernicles, as Anser indica. 
GENUS VI. CYGNUS. 
Ext. Car. Pedes magni, digitis posterioribus parvis, gibbosis, 
mediis longissimis. ostrum magnum, lateribus parallelibus. Nares 
subovales, in medio rostri posite. Cervix longa. 
Ext. Cuar. feet large, with the posterior toes small, gibbous, 
the middle ones longest. Bill large, the sides parallel. Nostrils sub- 
oval, placed in the middle of the bill. Neck long. 
Cyenus. Ray., Briss. 
Anas. Linn., Lath. 
Type. Oygnus ferus. 
Affinities. Although we have placed the swans with the geese, we 
are not by any means certain that it is their proper place. 
GENUS VII. SARKIDIORNIS. 
Ext. Cuar. Pedes digitis posterioribus mediocribus, in tarsis alte 
locatis. _Zarsi mediocres. Rostrum in maribus caruncula magna 
compressa culmine. Nares rotundate magne. Ale una ealcaria 
-armate, et remigibus apices versus incurvatis. Cauda ad apicem 
truncata. 
Ext. Cuar. Jeet with the posterior toes moderate, placed high 
- on the tarsi. Zarsi moderate. ill in the males with a large com- 
pressed caruncle on the top. Wings each armed with a spur, and 
_ with the quills incurved towards the points. Tail squared at the end. 
Carina. Steph. 
AnsER. Linn. 
SARKIDIORNIS nobis, °° 
PLECTROPTERUS. Steph. 
Type. Sarkidiornis melanotus. 
_ Various have been the genera in which the bird before us has 
been placed (Anser melanotus, Linn.), with none of which does it 
agree. We have therefore proposed a new one for it. 
Affinities. We have placed it, as far as we have been able (no 
. 
