5S2 HABITS, &C. OF THE TEUMPETER. 
action of the muscles of the bird, when it uttered its pecu- 
liar cry, rendered it very difficult to ascertain this point 
with certainty ; but it is not difficult to conceive how the 
voice, formed deeply within the body, would be materially 
affected by the direct communication of the windpipe with 
the great air-cells of this singular bird. 
Description of the Di^awing, Plate XVI. 
Fig. 1. Opened thorax of the Trumpeter, of the natural 
size. 
a. Dilated portion of the trachea. 
h, b, A small muscle tending to draw up the 
bronchial tubes, 
c, c. The bronchial tubes, 
df. The heart in situ. 
% The inverted trachea and bronchial tubes, shew- 
ing the openings into the bronchial tubes. 
3. Magnified view of the two bronchial tubes, e, e. 
The membrane forming their approximate 
sides. 
s, The bony septum dividing the lower part 
of the trachea. 
h, The membranous plates which fringe the 
sides of the septum, 
Liverpool, 7 
J^st 13. 1825.i 
