BRENT GOOSE. 



207 



Fig 1 



2 twelfths long. The stomach, c d ef, is a very highly developed muscular 

 gizzard, placed obliquely, and of an elliptical form, its length being 1 inch 9 

 twelfths, its breadth 2 inches 11 twelfths. This great breadth is caused, as 

 in other birds of this family, by the vast size of the lateral muscles, of which 

 the left, d, has a thickness at the middle of 1 inch 4|- twelfths, the right, e, 

 of 1 inch 3 twelfths, thus leaving but a very small space between the two 

 grinding surfaces, which are placed obliquely. The lower muscle, f, is 

 narrow and of moderate thickness. The epithelium is soft, unless on the two 

 grinding plates, which are of an elliptical form, a little concave, smooth in the 

 middle, longitudinally grooved toward the margins. The proventricular 

 belt of glandules is 1 inch 3 twelfths in breadth. The stomach contained a 

 large quantity of pure quartz sand. The pylorus is destitute of valve. The 



