LONG-EARED OWL. 
139 
twelfths in length, their greatest diameter 5s twelfths, their distance from 
the anus 3 inches and a quarter. The cloaca is of an enormous size, ovate, 2 
inches long, 1 inch 2 twelfths broad. It contains a calculous concretion 9 
twelfths long, 7 twelfths broad, and 3 twelfths thick. 
The trachea, which is 3 inches long, is 3§ twelfths in breadth at the upper 
part, 2\ twelfths in the middle, and 3 twelfths at its lower extremity ; its 
rings about 75 in number, cartilaginous, and considerably flattened. The 
lateral muscles are strong, the sterno-tracheal moderate, and there is a single 
pair of very slender inferior laryngeal muscles. Five of the lower rings are 
elongated, arched, and slit. The bronchi are rather long, of 12 half rings. 
The conch of the ear. Fig. 1, is of enormous size, extending from the level 
of the forehead over the eye to the chin, in a semilunar form, of which the 
posterior curve is 3 inches, and the distance between the two extremities in 
a direct line 1 inch and a half. There is an anterior semicircular flap in its 
whole length, 5 twelfths in breadth at the middle. The aperture or meatus 
externus is of a rhomboidal form, 4i twelfths in length, 3J twelfths broad, 
bounded anteriorly by the eye, posteriorly by a ligament extended along the 
edge of the occipital bone, above by a ligament stretching to the operculum, 
below the articulation of the. lower jaw. Above the meatus is a deep 
depression covered with skin, above which another ligament stretches across 
to the operculum. 
In another specimen, a female, the oesophagus is 5k inches long, its average 
diameter 11 twelfths. The intestine is 21 inches long, from 2k twelfths to 
1 twelfth in diameter ; the coeca are 2i inches in length ; their greatest 
diameter 4 twelfths ; the cloaca still larger than that of the other individuals, 
being 2 inches long. 
