respecting the Water it contains , See. 365 
valvular orifice, and the cuticular lining terminates exactly on 
the edge of this valve, covering only that half of it, which 
belongs to the third. 
The fourth or true digesting stomach is about 2 feet 9 inches 
long : its internal membrane has 18 plica? beginning at its orifice, 
(9 on each side,) 4 inches broad. They are continued down for 
about 22 inches, increasing to a great degree its internal sur- 
face : beyond these the internal membrane is thrown into rugae, 
which follow a very serpentine direction, and close to the py- 
lorus there is a glandular projection, one end of which is opposed 
to the orifice, and closes it up, when in a collapsed state. 
These appearances will be better explained by the drawings 
(Plates XV. and XVI.) than by verbal description. 
The camel's stomach anteriorly forms one large bag, but 
when laid open is found to be divided into two compartments 
on its posterior part, by a strong ridge which passes down from 
the right side of the orifice of the oesophagus in a longitudinal 
direction. This ridge forms one side of a groove that leads to 
the orifice of the second stomach, and is continued on beyond 
that part, becoming one boundary to the cellular structure 
met with in that situation. From this ridge eight strong mus- 
cular bands go off at right angles, and afterwards form curved 
lines till they are insensibly lost in the coats of the stomach. 
These are at equal distances from each other, and being 
intersected in a regular way by transverse muscular septa, 
form the cells. This cellular structure is in the left compart- 
ment of the stomach, and there is another of a more super- 
ficial kind on the right, placed in exactly the opposite direction, 
made up of 21 smaller rows of cells, but entirely unconnected 
with the great ridge. The appearance these parts put on, and 
