218 
AMERICAN RING PLOVER. 
being 5 twelfths, at the distance of 1 
inch 4 twelfths ; the proventriculus, 
be, 4 twelfths in breadth, its glan- 
dules forming a belt 6 twelfths in 
breadth. The stomach, c d e, is ra- 
ther large, roundish, compressed, 9 
twelfths in length, 10 twelfths in 
breadth ; the lateral muscles 5 twelfths 
in thickness ; the epithelium remark- 
ably dense, thick, with two broad 
granulated ridges on each side, form- 
ing grinding surfaces. The intestine, 
efgh, is rather short, and wider 
than in the other species ; its length 
9J inches, its width at the upper part 
4 twelfths, diminishing to 2 twelfths. 
Cceca 1 inch 4 twelfths long, cylin- 
drical, 1 twelfth in width ; their dis- 
tance from the extremity 1J inches. 
Trachea 2i inches long, flattened, 
from 2 twelfths to 1 twelfth in 
breadth ; its rings about 90, cartilagi- 
nous. Bronchial half rings about 15. 
Lateral and sterno-tracheal muscles 
strong ; a single pair of inferior la- 
ryngeal muscles. Adult male. 
AMEEICAN RING PLOVER. 
Charadrius semipalmatus, Bonap. 
PLATE CCCXX. — Male and Young. 
I have had great pleasure in observing the migrations of this species, par- 
ticularly in early spring, when great numbers enter the southern portions of 
the United States, on their way northward, where it is now well known to 
