332 MR. W. H. FLOWER ON PITHECIA MONACHUS. [ Dee. 9, 
all along the canal almost to the duodenum. There are no valvulee 
conniventes, and nothing to distinguish the ileum from the jejunum. 
The length of the colon, from the ileo-czecal valve to the anus, is 22 
inches : it is rather smaller than the csecum in calibre, rapidly dimi- 
nishing for the first 3 inches, then acquiring a uniform diameter of 
about ‘4 inch, which is somewhat increased in the descending portion 
and rectum. The cecum is large and long, of greater calibre than 
the colon, from which it is distinctly marked off by a constriction, 
passing obliquely round the intestine, and slightly diminishing in 
size as it approaches its terminal end, which is obtuse and rounded. 
It presents a tolerably uniform curve, almost a semicircle in the same 
plane. Its length is 43 inches ; its diameter, at 1 inch from the ileo- 
ceecal valve, 1 inch. 
The liver weighed 190 grains. Its anterior margin is deeply cleft 
by three fissures, dividing it into four lobes. Of these, the first (from 
the left) and the third and fourth are of about equal size. The second 
is double the size of either of the others, and notched on its anterior 
margin by the fissure of the round ligament, while the gall-bladder 
lies on its under surface. The Spigelian lobe is distinct. The cystic 
duct is “6 inch long, and joins the hepatic duct at a very acute angle. 
The common bile-duct, rather more than an inch in length, enters the 
posterior part of the duodenum, with the pancreatic duct, half an inch 
from the pylorus. The spleen is simple, long and narrow, tapering 
at the lower, more obtuse and notched at the upper end, 22 inches 
long, and ‘4 inch wide at the middle. 
The suprarenal bodies are very obtuse (slightly flattened) cones, 
their axis measuring } inch, and the longest diameter of their base 
about the same. The weight of each is 3 grains. Their colour is dark 
purple, deeper than that of the kidney. The base of the right is closely 
approximated to the corresponding kidney. The left, which is more 
rounded in form, is less closely connected. The kidneys are of the 
same form as in the human subject. Their length is ‘85 inch. The 
right is placed slightly lower than the left. The left kidney weighed 
24 grains ; the right about a grain less. The urinary bladder, when 
distended, is capacious, of an elongated pyriform shape, having a glo- 
bular fundus and a cylindrical or rather fusiform neck. The uterus 
is very small, elongated, and cylindrical, not bifid ; *75 inch long, and 
‘2 inch in diameter. The ovaries are °3 inch long, narrow, pointed at 
each end, and slightly flattened, of a pale pinkish colour. 
The vertebral formula of this specimen is, cervical 7, dorsal 13, 
lumbar 6, sacral 3, caudal 26. 
There is considerable variation in the number of the vertebree in 
the different genera of American Monkeys ; and even among species 
of the same genus, and individuals reputed (though perhaps on in- 
sufficient grounds) to belong to the same species, the number is not 
constant. The specimens contained in the British Museum (Cata- 
logue of the Bones of Mammalia, 1862) and in the Museum of the 
Royal College of Surgeons give the following results. Those marked 
with an asterisk belong to the last-named collection ; the numbers in 
the others are given on the authority of the above-named Catalogue. 
