68 MR. R. OWEN ON THE STOMACH OF SEMNOPITHECUS. 
mach. The liver is proportionately smaller in Semnopithecus than in Cercopithecus or 
Macacus. The spleen is of a more regular triangular shape, and is attached ‘to the 
omentum continued from the left side of the stomach. The pancreas, on the contrary, 
is proportionately larger than in these genera. Both the biliary and the pancreatic 
secretions enter the duodenum together, about 3 inches from the pylorus: were it not 
for the insertion of these ducts, one might almost suppose that what has been regarded 
as the true stomach was a portion of the intestinal canal. 
With so complicated a stomach, it might also be expected that the intestines would 
not be so long as in those Monkeys which have a simple stomach ; this, however, is not 
the case. The small intestines are longer in proportion to the body in Semnopithecus 
than in either Cercopithecus or Macacus, the ratio being respectively as 8 to 1, 6} to 1, 
and4 tol. The latter genus evidently manifests in this respect its closer approxi- 
mation to the Carnivorous type. 
The following table exhibits the admeasurements :— 
Semnopithecus | Semnopithecus | Cercopithecus Macacus 
Entellus. fascicularis. | albogularis. Cynomolgus. 
Length of the body from the nose Ft. In. Ft. In. Ft. In, Ft. In. 
to the root of the tail . . . eS ee Ih fie Pos 
Length of the small intestines .| 13 6 9 10 i eal 6 9 
Length of the large intestines. 2 10 eG S hen eae 
Length of the cecum . .. . 4 23 3 3 
As in all the preceding animals the intestines were prepared for admeasurement in 
the same manner, I believe the relative proportions may be relied upon. I mention 
this because the admeasurements given by M. Otto of the Semnopithecus leucoprymnus, 
would lead to the conclusion that the intestinal canal was much shorter. His admea- 
surements of that species, as published in the ‘ Nova Acta, Bonn.’ tom. xii. p. 511. are, 
Ft. In. 
Brom the-nose to the root-er the tad... +. se eee ee 
Leneth-or.the surall intestisics:... sy ope toy sans, ae oR 
Length of the large intestines . cag Soesaeyisenn it sprees Is) 
LESTE LW Gh 173072271 MP ey ae ws 2 
It is in the description of the above species of Semnopithecus by this scientific natu- 
ralist, that the first account of the sacculated form of stomach in Quadrumana ap- 
pears :—a discovery which was made known to the English reader through the ana- 
lysis of his paper contained in the third volume of the ‘ Zoological Journal’. The 
leucoprymnus, which M. Otto marks doubtingly as being a Cercopithecus, is now by 
common consent referred to M. F. Cuvier’s new genus Semnopithecus ; and the recur- 
rence of this remarkable modification of the stomach in two other species of the same 
group, renders it highly probable at least that it is a generic peculiarity. 
