1902 - 3 .] Abdominal Viscera of Cercocebus fuliginosus, etc. 529 
followed as far as the commencement of the sigmoid flexure, but 
on the descending colon it is far from being distinct. The dorsal 
band of the ascending colon is found to disappear at the splenic 
flexure, and so is the shortest of the three. 
Liver. — It is a matter for regret that the liver of this animal is 
pathologically enlarged ; and, consequently, that some of its special 
features may have been modified or exaggerated. But the enlarge- 
ment does not appear to have been great ; nor has it produced any 
distortion. It appears to have been perfectly uniform. This last fact 
leads one to suppose that a normal liver of Lagothrix would show 
the same characteristics, but possibly in a lesser degree. The 
enlargement, no doubt, accounts, in a measure, for the considerable 
area of liver which is visible on first removing the wall of the 
abdomen. But this circumstance is, I think, largely contributed 
to by the flatness of the arch of the diaphragm as compared with 
that of Cercocebus. There is a much greater volume of liver to the. 
right of the falciform ligament than to its left. 
The measurements of this liver are as follows : — 
The actual figures are not of so much interest as is the relation 
between the transverse and dorso- ventral diameters, and the com- 
parison of this relation with that of the same two diameters in 
Cercocebus. In Lagothrix the transverse measurement is much 
greater than the dorso -ventral. In Cercocebus the difference is not 
nearly so great — it only amounts to 5 mm. Since the liver in 
both animals stretches right across the abdomen, its measurements 
give us some idea (not absolutely accurate, no doubt, but still 
suggestive) of the form of the cephalic part of the abdomen. It 
is, therefore, evident that in Lagothrix, though a New World 
monkey, the abdomen resembles that of man in shape more closely 
than does the same cavity in Cercocebus ; in spite of the fact that 
the latter animal is placed higher in the zoological scale (cf. the 
outlines given in figs. 1 and 4). This point is not here strongly 
insisted upon, because it may be objected that the dimensions of 
the liver do not necessarily afford an absolutely safe guide to the 
Greatest transverse diameter 
= 104 mm, 
= 75 „ 
= 100 „ 
dorso-ventral ,, 
cephalo-caudal ,, 
