216 BROWN PELICAN. 



communicates by an apertm-e 3 twelfths in diameter, with a sac, de, of a 

 roundish or somewhat triangular form, from which the duodenum,/^ h i, 

 comes off. For half an inch, at/, its diameter is only 2^ twelfths, but it 

 then enlarges to 5 twelfths, and passes to the left side, curving forwards to 

 the level of the upper part of the proventriculus, and at the distance of 6^ 

 inches from its commencement returns upon itself, curves under the 

 right lobe of the liver, and is convoluted in longitudinal folds, of which 

 there are 26 in all, or 13 double folds. The intestine is 11 feet 11 

 inches long, and varies in diameter from ^ inch to 4 twelfths. The con- 

 tents of the gullet and stomach are two fishes, about 7 inches in length, 

 and 2^ in depth, one entire, the other partially dissolved. The rectum 

 is 4^ inches long, including the cloaca, which is a large sac capable of 

 being dilated to a diameter of 2 inches. The ccEca are 1 inch and 10 

 twelfths long. This individual has several of the eggs or yolks largely 

 developed, the largest having a diameter of 3 inch, and ready to be re- 

 ceived into the oviduct, which is convoluted above the intestine, or be- 

 tween it and the kidneys, and is of very large size, having at its lower 

 part a diameter of li inch. 



Fig. 2 represents, of the natxu-al size, the extremity of the intestine, 

 a h ; the cloaca, I ; the cceca, c d ; the extremely enlarged, tortuous, 

 longitudinally, and obliquely, rugous oviduct, efg h ; and the ova or 

 yolks, i i, of which one is ready to pass into the tube, there to receive 

 the albumen and shell, and finally to be conveyed to the termination of 

 the guts. 



The trachea is 1 foot 8 inches long, considerably flattened at the 

 upper part, round at the lower ; its diameter about 7^ twelfths ante- 

 riorly, 4 twelfths at the middle, 4^ twelfths at the lower part. There 

 are 182 rings, which are exceedingly thin and slightly ossified. The 

 contractor muscles are slender, the sterno-tracheal moderate ; there are 

 no inferior laryngeal muscles. Beyond the last entire tracheal ring are 

 six half rings on each side, of which the last is very large, and the two 

 tosrether extend to a width of 1 inch 2 twelfths. The bronchi, which 

 curve outwards, are rather short, very vnde, their diameter anteriorly 

 being 7 twelfths ; the right bronchus with 32 half rings, the left with 

 24. 



