208 



BRENT GOOSE. 



lis 



duodenum e g h, has a diameter 

 of 4 J twelfths, and curves at the 

 distance of 5 inches; the intes- 

 tine is disposed in longitudinal 

 folds, there being 16 turns, and 

 measures 5 feet 11 inches in 

 length. It retains a pretty uni- 

 form breadth as far as the rec- 

 tum, Fig. 2, a b, which enlarges 

 to 7 twelfths. The cceca, ace, 

 which come off at the distance 

 of 5 inches from the extremity, 

 are 5|- inches in length, very 

 narrow, their diameter at the 

 base being about 1 twelfth, to- 

 wards the end 2 twelfths, and 

 their greatest breadth toward the 



middle 3^ twelfths. 



In Fig. 2 



is seen part of the oviduct, d b, 

 which opens at the distance of 

 |- inch from the anus, opposite 

 b, and above or anterior to the 

 ureters. In this bird there is 

 no decided cloaca, which is 

 equally the case with other 

 species of this family, and with 

 such birds generally as pass 

 their faeces in a compact cylin- 

 drical form. In this respect, 

 Swans, Geese, and Ducks are analogous to Pheasants, Grouse, and Partridges; 

 they being in fact aquatic Gallinaceae. 



The trachea is 11 inches long, its diameter at the upper part 4^ twelfths. 

 It is a little flattened above, less so in the middle, and somewhat compressed 

 at the lower extremity, where its diameter is 3 twelfths. There are 150 

 free osseous rings, and 15 additional united rings at the lower part. The 

 inferior larynx is destitute of muscles. The space between the last ring of 

 the trachea and the first bronchial ring is large, being 4|- twelfths in length. 

 The bronchi are very short, rather wide, with about 10 incomplete rings, the 

 extremities of which nearly meet. The lateral muscles are strong, and there 

 is a pair of cleido-tracheal, and a pair of sterno-tracheal muscles, the former 



