1865.] ANATOMY OF THE BACTRIAN CAMEL, 263 
were circular, the largest measuring 14 inch in diameter, the folds 
forming a circular receptacle that would contain about 2 drachms of 
fluid ; one of these was seated at the commencement of the ceecum, 
and two on the colon, near to the ileo-czecal valve. In the ileum, 
within a space of 6 inches from this valve, were five folds of the 
mucous membrane, of a crescentic shape, the largest about 1 inch 
in width, their crescentic edges being all towards the ileo-cecal 
valve; the largest of these would hold about a drachm of fluid. In 
other parts of the ileum, a short distance from the last named, were 
slight folds of the lining membrane, but assuming a crescentic shape. 
To the naked eye these, both circular and crescentic, appeared to be 
mucous follicles surrounded by the folds above described ; but on 
putting them under the microscope, they were seen to be composed 
of club-shaped villi, about sth of an inch in length, and having 
much the appearance of those on the surrounding mucous membrane, 
but of larger size. 
1. The cxcum and portions of the ileum and colon: B:. ileum; C. colon; 
D. excum; showing the circular and semilunar folds. 2. The elevations 
on the lining membrane of the small intestine. 3. The same, magnified. 
The ileum, over a considerable extent of its surface, presented a 
whitish-streaked, mottled appearance, arising from transverse rows of 
elevated villi, as seen in fig. 2; the magnified representation of these 
villi is shown in fig. 3. The rectum in several parts was folded into 
