210 



THE BELTED KINGFISHER. 



from lj twelfths to 1 

 twelfth. The cloaca, j k, 

 is globular, 1 inch in diame- 

 ter. There are no cozca; 

 the rectum in its interior 

 part has a width of only \ 

 twelfth. 



The trachea is 4 inches 1 

 twelfth long, 3^ twelfths in 

 breadth at the top, rapidly 

 decreasing, so that at the 

 distance of 1 inch to be 2^ 

 twelfths, and at the lower 

 part 2 twelfths. Its rings 

 are farm, slightly flattened, 

 excepting those at the top, 

 of which about 12 are car- 

 tilaginous. There are 72 

 rings, the lowest entire ring 

 very large, with a middle 

 partition. The lateral mus- 

 cles are very slender, as 

 are the sterno-tracheal; and 

 there is a very large inferior 

 laryngeal muscle inserted 

 into the first bronchial ring, 

 as well as into the last ring 

 of the trachea. The bronchi 

 are rather short and narrow, 

 of about 15 half rings. The 

 inferior laryngeal muscles 

 may be divided into three 

 portions, an anterior, a mid- 

 dle, and a posterior; and 

 thus supply a desideratum, 

 no bird having hitherto been 

 examined in which there 

 are four inferior laryngeal 

 muscles, including the ster- 

 no-tracheal slip. 



