210 
THE BELTED KINGFISHER. 
from 15 twelfths to 1 
twelfth. The cloaca, j Ic, 
is globular, 1 inch in diame- 
ter. There are no cceca; 
the rectum in its interior 
part has a width of only 5 
twelfth. 
The trachea is 4 inches 1 
twelfth long, 3* twelfths in 
breadth at the top, rapidly 
decreasing, so that at the 
distance of 1 inch to be 25 
twelfths, and at the lower 
part 2 twelfths. Its rings 
are firm, slightly flattened, 
excepting those at the top, 
of which about 12 are car- 
tilaginous. There are 72 
rings, the lowest entire ring 
very large, with a middle 
partition. The lateral mus- 
cles are very slender, as 
are the sterno-tracheal; and 
there is a very large inferior 
laryngeal muscle inserted 
into the first bronchial ring, 
as well as into the last ring 
of the trachea. The bronchi 
are rather short and narrow, 
of about 15 half rings. The 
inferior laryngeal muscles 
may be divided into three 
portions, an anterior, a mid- 
dle, and a posterior ; and 
thus supply a desideratum, 
no bird having hitherto been 
examined in which there 
are four inferior laryngeal 
muscles, including the ster- 
no-tracheal slip. 
