48 
HISTORY OF 
than the Swans, which are now placed first by Cuvier : after 
which, we shall place the genus Fuligula, Ray , subdivided 
by two new sub genera, the first containing F. Rufina, Steph. 
as approaching the genus Mergus, and the last containing 
F. Stelleri, Pallas , approaching to the genus Somateria, Leach. 
After which will come the true Water, Marine, or Diving Ducks, 
then those frequenting fresh water, after which the Sheildrakes, 
Geese, and Swans. 
We shall, however, enter more fully into the divisions of 
these families and genera, especially those of the Ducks, the 
divisions of which will be almost entirely founded on the 
form of the skeleton and trachea, when we arrive at that 
portion of our work. The subjects will also be illustrated by 
many woodcuts of trachea, and other parts, from which the 
divisions are taken. 
