BLUE- WINGED TEAL. 
287 
Male. Width of mouth 5 twelfths ; upper mandible very deeply concave, 
with a median prominent line, which is papillate for half its length ; th" 
lamellae of the upper mandible 55, projecting a little beyond the margin, o: 
the lower about 180, and extremely inconspicuous. Tongue II inches long, 
fleshy, deeply grooved above, with thin lamellate margins, the tip semi- 
circular, thin, and horny. (Esophagus Gl twelfths long, its width 4 twelfths 
at the lower part of the neck enlarged to 7 twelfths, then contracting to 3 
twelfths ; the proventriculus oblong, 5 twelfths in breadth. Stomach a 
transversely elliptical, oblique gizzard, 1 inch t twelfth long, 1 inch 3 
twelfths broad, its lateral muscles extremely developed, the right 6 twelfths, 
the left 5 twelfths in thickness, the inferior muscle narrow and prominent, 
as in all birds of this family ; epithelium very dense, with two opposite con- 
cave grinding surfaces. Intestine 3 feet 7i inches, with 16 folds, its general 
width only II twelfths, enlarging here and there to 2 twelfths ; coeca 41 
inches long, for II inches 1 twelfth in breadth, enlarging to 3 twelfths, and 
toward the extremity 2 twelfths. Rectum 21 twelfths long, its width 2| 
twelfths. Right lobe of the liver 1 inch 5 twelfths, the other 1 inch 2 
twelfths. 
Trachea 5 inches long, from 2| twelfths to 2 twelfths in width, mode- 
rately flattened, ending in a transversely elongated tympanum, projecting 
to the left side, with a roundish thin bony prominence ; its greatest breadth 
8 twelfths, its length 3 twelfths ; the rings rather broad, firm, 115, besides 
a few blended with the tympanum. The muscles as usual. Bronchial half 
rings 28 and 34. 
BLUE-WINGED TEAL. 
Anas discors, Linn. 
PLATE CCOXCIII. — Male and Female. 
Is it not strange, reader, that birds which are known to be abundant on 
the Saskatchewan river during the breeding season, and which have been 
observed as far north as the 57th parallel, should also be found breeding at 
nearly the same period in Texas ? Stranger still it is that species should 
proceed from certain points, or winter quarters, to both of the above-men- 
