Zoological Society. 69 
formed, however, a small part of this covering, as after extending 
down over half the abdomen it was reflected upwards, in front of 
the liver. The lower half of the abdominal cavity was overlapped 
by broad and thick adipose processes, continued from the lower con- 
volutions of the colon, without being connected with the great 
omentum, and from the fundus of the urinary bladder. ‘The appen- 
dices epiploice of the human colon may be regarded as rudimentary 
conditions of the adipose folds here so enormously developed. The 
stomach corresponded in form and relative size with that of the Chin- 
_chilla (see Trans. Zool. Soc., vol. i. p. 51. pl. V.). The left blind 
extremity projected about an inch beyond the cardia; the pyloric 
end became suddenly contracted: the cuticular lining of the ceso- 
phagus terminated at the cardia in five pointed processes, radiating 
from the cardia. 
“The duodenum was dilated, as in many other phytophagous Ro- 
dents, at its commencement; it descends with a slight sigmoid 
flexure tu the right lumbar region, then crosses over to the left side, 
being freely suspended in a broad duodenal mesentery, which con- 
tracts as the gut perforates the base of the meso-colon to become the 
jejunum. ‘The small intestines presented the usual disposition : the 
cxcum is of moderate length, viz. four inches, with a diameter of 
two and a half inches, thus corresponding in general form with that 
of the Chinchilla. The colon first crosses obliquely the lower part 
of the abdomen, and returns, forming a fold of about four inches in 
extent; it then describes a second much larger and narrower fold, 
of ten inches in length: it is at the bend of this fold that the feces 
begin to be separated into pellets, and it is from these loops that the 
omental processes are continued: the colon then bends over the root 
of the mesentery, passing below the stomach to the left side of the 
abdomen, where it describes a series of convolutions before ending 
in the rectum. No omental process is continued from these folds, 
but the meso-colon, to which they are-suspended, is of great breadth, 
and was loaded with fat. 
Feet. Inches. 
Length of the small intestines ...... 14 9 
sores) ditto f oo oes Y Bristee 
«The anal, vaginal, and urethral outlets are separate from one 
another. 
“The liver consists of a left lobe, a cystic lobe, and two small 
right lobes, with a spigelian appendage. ‘The cystic lobe is fissured, 
and the left division is perforated on its free convex surface to re- 
ceive a process of the suspensory ligament. 
* The gall-bladder was of very small size. 
“‘ The spleen is triangular, with the upper or anterior angle most 
produced. 
“‘The kidneys and suprarenal glands as usual in Rodents. The 
heart presented the usual form; two superior venz cave, the left 
joining the inferior cava, and receiving the coronary vein. The 
