DOUBLE-CRESTED CORMORANT. 631 



is convoluted, forming twelve turns in all. It measures 5 feet 10 inches 

 in length ; its width in the duodenal part is 4^ twelfths, afterwards 3 

 twelfths ; the cceca, * i, 6 twelfths long, 3 twelfths broad, 4 inches from 

 the extremity ; the rectum, ijk, for 3 inches has a width of 4| twelfths, 

 and terminates in a globular cloaca, k, 1 inch 10 twelfths in width. 



The trachea is 11 inches long, from b\ twelfths to 4^ twelfths in 

 breadth, considerably flattened ; its rings moderately firm, broad, 138, 

 with 2 additional half rings. Bronchi of moderate width, one with 20, 

 the other with 22 half rings. Lateral muscles large, as are the sterno- 

 tracheal slips. 



This species has a slender trigonal bone 10^ twelfths in length, ar- 

 ticulated to the crest of the occipital bone. The anterior part of the 

 cerebrum tapers to a point much in the same manner as in the Turkey 

 Buzzard, forming a similar lobe, 4 twelfths in height at its base, from 

 the extremity of which comes off the olfactory nerve, which is about the 

 5th part of a twelfth in breadth, runs a course of half an inch along the 

 septum of the eyes, and is distributed to the membrane of the nasal 

 cavity, which is of a triangular form, 6 twelfths in length, 5 twelfths 

 in breadth, with a single large turbinated bone. The external aper- 

 ture of the nostrils is completely obliterated, its place being filled by 

 bony matter. The large branch of the 5th pair of nerves passes in its 

 usual direction to the anterior part of the upper mandible. 



