410 



PURPLE MARTIN. 



On each side of the tongvie is seen a prominence, which is caused by a 

 narrow oblong salivary gland, lying within the ramus of the lower 

 jaw on each side, and between it and the tongue, separated from the 

 mouth only by the mucous membrane, and formed of distinct tubulai' 

 bodies, of which the ducts enter nearly oppo- 

 site the top of the tongue. That organ is 

 short, triangular, sagittate and papillate at 

 the base, fleshy, slightly convex above, thin 

 and horny towards the point, which is slightly 

 emarginate. The oesophagus, abc, is 2 inches 

 7 twelfths long, with an average width of 2|^ 

 twelfths ; the proventriculus, i c, S twelfths 

 across, its glandules oblong, forming a belt 4 

 twelfths in breadth. The stomach, de, is of 

 an irregular somewhat elliptical form, 9 

 twelfths in length, 8 twelfths in breadth ; its 

 muscular coat moderately thick, the muscles 

 distinct, the tendons large ; the epithelium 

 thick, dense, with a few broad longitudinal 

 rugae. The contents of the stomach are in- 

 sects of various kinds. The lobes of the liver 

 are very unequal, the right being 11 twelfths 

 long, the left 7. There is a gall-bladder of 

 an oblong form, 5 twelfths long. The intes- 

 tine, fg h, is short and wide, its length 7 

 inches, its breadth from 3 twelfths to 2^ 

 twelfths. The coeca, ^ i, are extremely small, 

 2 twelfths long, | twelfth broad. The rectum,/, is short and wide, the 

 cloaca, k, ovate and 6 twelfths in breadth. 



The trachea is 1 inch 9 twelfths long, considerably flattened, from 

 11 twelfth to 1 twelfth in breadth; its rings 52, firm, with 2 dimi- 

 diate rings. The lateral muscles are moderate, the sterno-tracheal 

 ' slender ; there are four pairs of inferior lai-yngeal muscles. The bron- 

 chi are composed of about 15 half rings. 



