BKENT GOOSE. 
207 
2 twelfth 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 41 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 
