( 616 .) 



GREEN-WINGED TEAL. 



Anas crecca, Linn. 



PLATE CCXXVIII. Vol. III. p. 219. 



Male. Width of mouth 5 twelfths ; upper mandible very deeply 

 concave, with a median prominent line, which is papillate for half its 

 length ; the lamellae of the upper mandible 55, projecting a little beyond 

 the margin, of the lower about 180, and extremely inconspicuous. 

 Tongue 1^ inch long, fleshy, deeply grooved above, with thin lamel- 

 late margins, the tip semicircular, thin, and horny. (Esophagus 6| 

 twelfths long, its width 4 twelfths, at the lower part of the neck enlar- 

 ged to 7 twelfths, then contracting to 3 twelfths ; the proventriculus 

 oblong, 5 twelfths in breadth. Stomach a transversely elliptical, ob- 

 lique gizzard, 1 inch 1 twelfth long, 1 inch 3 twelfths broad, its late- 

 ral 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 ; epitheliiun very dense, with two opposite concave grind- 

 ing surfaces. Intestine 3 feet 7^ inches, with 16 folds, its general 

 width only 1-^ twelfth, enlarging here and there to 2 twelfths ; coe- 

 ca 4^ inches long, for 1^ inch 1 twelfth in breadth, enlarging to 3 

 twelfths, and toward the extremity 2 twelfths. Rectum 2\ 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, mo- 

 derately flattened, ending in a transversely elongated tympaniun, project- 

 ing 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. 



