TIIE YELLOW-THROATED YIREO. 
143 
emarginate and papillate at the base, flat above, tapering to a horny, deeply 
slit, lacerated point. The width of the mouth is 41 twelfths. The oeso- 
phagus is 1 inch 9 twelfths long, funnel-shaped at the 
commencement, at the distance of half an inch its 
width is If twelfths, and thus continues until it enters 
the thorax, soon after which it enlarges to form the 
proventriculus, of which the breadth is 3 twelfths. 
The stomach is of moderate size, of a broadly elliptical 
form, considerably compressed ; its length 6 twelfths, 
its breadth 5 twelfths, its muscles pretty large and 
distinct, its tendons of moderate size ; the epithelium 
thin, reddish-brown, with eight longitudinal rugae on 
one side, and five on the other. The belt of proven- 
tricular glandules is 2£ twelfths broad. The intestine 
is 5f inches long, from twelfths to 1 twelfth in 
width, the rectum 2 twelfths at first, the cloaca globu- 
lar, about 4 twelfths ; the coeca 14 twelfths long, about 
f twelfth wide, and placed at the di stance of 9 twelfths 
from the extremity. 
Jhe trachea is 1 inch 2 twelfths long, from 1 twelfth 
to I twelfth in width, moderately flattened, its rings 
rather firm, about 50, with 2 dimidiate ; the muscles 
disposed as in the Thrushes and Warblers, there being 
four pairs of inferior laryngeal on each side, besides the sterno-tracheal. 
The bronchi short, slender, of about 10 half rings. 
The Swamp Snowball. 
Hydrangea quercifolia, Willd ., Sp. PL, vol. ii. p. 634. Pursh, Flor. Amer. 
Sept., vol. i. p. 309. — Decandria Digynia, Linn. — Saxifrage, Juss. 
This plant is found on the broken sandy banks bordering small water- 
courses, and is abundant in such situations in the uplands of Louisiana. It 
seldom grows beyond the size of a bush. The blossoms are lasting, and 
although without odour, are pleasing to the eye, on account of their pure 
white colour when first expanded ; they dry on the stalks, retaining their 
form, and remaining until winter. The species is characterized by its 
oblong, deeply sinuate leaves, which are downy beneath, and its radiated 
loosely thyrsiform cymes. 
