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intend presenting our readers with plates 
of the Trachece belonging to as many of 
the species, as we may be able to procure 
in a recent state. 
Montagu in order to render the subject 
more intelligible, has given names to the 
different parts ; which names we intend to 
adopt. The aspira arteria consists of 
three principal parts, viz. the trachea or 
windpipe, properly so called, the labyrinth 
or swelling at the lower extremity, and the 
bronchice or divarications at the bottom, 
which connects the trachea with the lungs. 
He begins by making two divisions in 
the birds belonging to this genus, 1st. the 
Ducks with short wings, which he calls 
Diving Ducks. 2nd. Grovelling Ducks. 
In the first division the trachea is com- 
posed of two distinct parts,one a compressed 
chamber, more or less covered with a thin 
membrane situated on the left side, which is 
called the tympanum ; at the back of 
which is another chamber, formed by the 
junction of the base of the bronchice, the 
bony rings of which are more or less unit- 
ed by ossification. This part has been 
