396 



GREAT HORNED OWL. 



liary ducts entire at 9 inches. The intestine varies from 4 twelfths to 2 

 twelfths in width, and is short, being 31 inches long. The cloaca is glo- 

 bular, about 1^ inch in diameter ; the coeca, Fig. 2, are 3 inches long, for 

 1^ inch 2J twelfths in diameter, in the rest of their extent of an oblong 

 form, 7 twelfths in width ; the rectum, including the cloaca, 3 inches 9 

 twelfths long. The aperture of the pylorus is extremely small, 1^ twelfth 

 in width, with two longitudinal valves, and a thin semicircular flap. 



The trachea is 5| inches in length, flattened, ^ inch broad at the 

 commencement, gradually contracting to 4^ twelfths, toward the lower 

 part enlarging to 5^ twelfths and much flattened, its thickness there 



Fig. 3 



