: 
GENUS III. DENDROCYGNA. a 
Ext. Cuar. Pedes digitis posterioribus longis, non lobatis un- 
guibus longis armatz. TZarsi robusti et longi. Rostrum mediocre 
validum altius-quam latum. Nares ovales magne prope culmen in 
medio rostri posite. Lamelle abbreviate. Cauda flexilis rotundata. 
Ale remigibus primariis magna incisura in medio parte. 
Exr. Cuar. Jeet with the posterior toes long, not lobated, and 
with long claws. Tarsi robust and long. Bill of moderate length, 
strong, higher than broad. Nostrils placed near the culmen in the — 
middle of the bill. Zamelle abbreviated. Tail flexible, rounded. 
Primaries with a deep notch in the middle. 
Anas. Jinn. 
DeEnDROCYGNA. Swainson. 
Types. Dendrocygna arcuata. 
This genus will be easily recognized by the great length of the 
tarsi, and at the same time rounded form of the tai Anas arcuata, 
Hors., or Anas viduata, Linn., may be considered as typical species. 
Affinities. The genus appears to form a beautiful connecting link 
between the true fresh-water ducks and the foregoing genus. 
GENUS IV. LEPTOTARSIS. 
Ext. Cuar. Sostrum mediocre ad basin, altius-quam latum, cul- 
mine complanata et ungue magno instructo. Nares parve, culmen 
versus locate. TZarsi longi et graciles. Digitt unguibus paululum 
incurvatis acutisque armati. 
Ext. Car. Bill moderate at the base, higher than broad, the 
culmen much flattened and with a large nail. Nostrils small, placed 
near the culmen. Tarsi long and slender. Toes armed with curved 
and sharp claws. 
Leprotarsis. Could. 
Affinity. The structure of the bill appears to ally this genus to 
that of Dendrocygna; while, on the other hand, that of the tail, 
which, though not elongated, is acuminate, to the genus Dajila. 
GENUS V. DAFILA. 
Ext. CuHar. Pedes digitis posterioribus, non lobatis, neds. 
longissimis. Zibie paululum denudate.  Aostrum longius capite 
lateribus parallelibus. Nares magne ovales, prope culmen ad basin 
posite. amelie ad marginem rostri continuate. Lingua subobtusa 
