MARSH HAWK. 407 
small papillz. The posterior aperture of the nares is oblong, 4 tweltths 
of an inch in length, but with an anterior slit 74 twelfths long. The 
tongue, a, is 84 twelfths long, fleshy, emarginate and papillateat the base, 
concave above, rounded and slightly emarginate at the tip. ‘The mouth 
islinchin breadth. Thecesophagus, abcde, which is 6 inches long, is very 
wide, with very thin parietes, and on the lower part of the neck is di- 
lated into a sac or crop, )c, which on being distended has a diameter of 
2 inches at the widest part. It then contracts to 10 twelfths as it en- 
ters the thorax ; its proventricular portion, de, has a diameter of 1 inch. 
Thestomach, ¢ fg, is roundish, 1 inch in diameter, somewhat compressed; 
its muscular coat extremely thin, being reduced to small parallel fas- 
cicult converging toward two tendinous 
spaces of an elliptical form, and about 
half an inch long. The intestine, g/, is 3 
feet 2 inches long; its diameter at the 
upper part 3 twelfths, towards the coeca 2 
twelfths. The rectum, ¢ 7, is 2 inches long, 
not including the cloaca, j, which is glo- 
bular and 1 inch in diameter. The coeca 
are extremely small, being 2; twelfths 
Tn 
»)) 
M/A 
long, and 1 twelfth in diameter. The 
pylorus has no valve properly so called, 
DSN} 
[phe 
but two ridges run from it into the in- 
testine to the length of about 3 twelfths 
of an inch. The gall-bladder is7 twelfths 
long and 4 twelfths in breadth. 
In a very small male, the cesophagus is 
Za iiinss 
Wg 
4? inches long ; the intestine 3 feet 4 in- 
ches. In a female, the intestine is 3 feet 
9 inches long. 
The trachea is 4;°5 inches Jong, flattened, 
4} twelfths broad at the upper part, gra- 
dually contracting to 2? twelfths; its rings 
95, extremely thin and unossified. ‘The 
bronchi are of moderate length, with about 
20 half-rings. The lateral muscles are 
thin, the sterno-tracheal slender. 
