WHITE-HEADED EAGLE. 



361 



Fig. 2. 



upper part, enlarges into a crop, of which the greatest width is 2^ 

 inches, lying on the right side 

 and in front, the trachea pass- 

 ing to the left. The walls of 

 the oesophagus are compara- 

 tively thick ; the external 

 transverse muscular fibres very 

 strong on the crop. On enter- 

 ing the thorax it contracts to 

 9 twelfths ; the proventriculus 

 14- inch in breadth. The sto- 

 mach is rather large, being 2^ 

 inches in length and breadth, 

 somewhat compressed ; its mus- 

 cular coat very thin, and com- 

 posed of coarse fasciculi; the 

 tendons round and about 7 

 twelfths in diameter. The pro- 

 ventricular glandules are 3 

 twelfths long, and i twelfth in 

 diameter, cylindrical, forming a 

 belt 2 inches in breadth. The 

 inner surface of the stomach is 

 quite smooth and glossy. The 

 aperture of the pylorus has three 

 valves. The duodenum curves 

 as in the adult, and is 18 inches 

 long. The whole length of the 

 intestine is 9 feet 2 inches ; its 

 width from 4i twelfths to 2^ 

 twelfths. The rectum dilates to 

 ^ inch, and the cceca merely form 

 two projecting knobs, 2i twelfths 

 long, and 1| twelfth in breadth. 

 The trachea is 9g inches 

 long-, its breadth from 9 twelfths 

 to 7 twelfths ; it is much flattened, and its rings, 118 in number, are 

 quite unossified. The lateral muscles are very large, at the upper part, 



