SHOVELLER DECK. 
293 
In a male, the roof of the mouth is deeply concave, with a prominent mid- 
dle ridge, on which are a few blunt papillm ; on the upper mandible are 50 
lamellte, on the lower about 65 below, and 85 above. The tongue, 8 twelfths 
long, large and fleshy, has two rows of lateral bristles. The oesophagus is 
Si inches long, 4 twelfths in diameter until the middle of the neck, when it 
enlarges gradually to half an inch. The proventricuius is 1J inches in length, 
with oblong glandules. The stomach is a -strong roundish gizzard, 1 inch 
and 2 twelfths long, 1 § inches broad ; its left muscle 7 twelfths thick, the 
right 62 twelfths ; its cuticular lining or epithelium of moderate thickness 
and longitudinally rugous. The intestine, 5 feet 1 inch long, varies in 
diameter from 3 to 2 twelfths ; the coeca are 2 inches 10 twelfths long, 
cylindrical and rounded, their diameter 3 twelfths ; the cloaca globular. 
The contents of the stomach were gravel and seeds of plants. 
The trachea is 6 inches and 2 twelfths long ; its diameter at the top 4 
twelfths, at the middle 2 twelfths, at the lower part Si twelfths. The infe- 
rior larynx is formed of three or four united rings, and has an irregular 
roundish bony expansion on the left side. The number of rings of the tra- 
chea is 98, of the bronchi about 25. The contractor muscles are large ; 
cleido-tracheales and sterno-tracheales. 
SHOVELLER DUCK.-MICOINE. 
Anas clypeata, Linn . 
PLATE CCGXCIV.— Male and Female. 
The Creoles of Louisiana are well acquainted with this species, under the 
name of “ Micoine,” the etymology of which I am unable to trace. In that 
country it arrives, both from the westward and from the eastern inland dis- 
tricts, along with the Blue-winged Teal, or at the commencement of autumn. 
It associates with that species, to which, as well as to the Green-winged, the 
Mallard, the Dusky Duck, and the Gadwall, I should consider it very nearly 
allied, notwithstanding the peculiar expansion of its biil. The Shovellers 
remain in the lower parts of Louisiana during the whole of the winter, and 
depart along with the Blue-wings between the end of April and the middle 
