740 DR. J. MURIE ON SPECIES OF [Dec. 12, 
lesion sufficient to have caused death. The various organs, particu- 
larly the intestinal tract, had their tissues watery and flabby. The 
absorbent and mesenteric glands were somewhat enlarged, and con- 
tained strumous deposit within them. Death evidently resulted 
from defective nutrition, which I have already several times observed 
to occur in those South American Monkeys. 
Anatomy of Viscera,—These were compared with those of Aleles 
Frontatus and Ateles belzebuth. The lungs agree with the first spe- 
cies, excepting in having the upper lobe of the left side smaller than 
the lower; in A. frontatus they are about equal in dimensions; all 
three species have four holes in the right, and two in the left lung. 
Liver.—This measured across, from the outer margin of the right 
to that of the left lobe, 5 inches, and from the anterior to the 
posterior border 4} inches. As in A. frontatus and A. belzebuth, 
this organ is large according to the size of the body. The right 
half, as in them, is divided into two equal-sized portions, with an 
anterior deep fissure their whole breadth. The left half is separated 
from that of the right side by a very deep superior and inferior cleft. 
It also is divided into two lobes, the upper or cystic of a somewhat 
heart-shape, and as large as the two on the right side taken together. 
The gall-bladder, which is capacious and long, lies in a wide and 
deep fissure, excavated in the cystic lobe. The lower lobe of the 
left half is about equal in size to one of those in the right half. The 
lobus Spigelii is very small and wedge-shaped ; there are two slight 
lateral indentations behind ; this lobe is rather more deeply divided 
in Ateles belzebuth and A. frontatus. 
The stomach is similar to what is found in Afeles belzebuth— 
namely, a moderately rounded cardiac end, and with the pyloric 
extremity narrowed and, as it were, drawn out. Length 77 inches ; 
greatest breadth at cardiac end 25 inches, at centre of viscus 13 
inch; pyloric end narrowed, fully 3 inches long, and 3 an inch in 
diameter. 
Small intestines 72 inches in length. Large intestines, including 
the caecum, 18 inches; the cecum itself is of a simple elongated 
conical form, and 33 inches long. 
Spleen wedge-shaped, with an additional elongated process at base ; 
length 2 inches, and 2 of an inch across at the broadest part. 
Kidneys simple, uniform, and agreeing with the two above-named 
species; the same may be said of the suprarenal bodies. 
Brain not examined. 
5. OBSERVATIONS UPON PRESBYTES ALBIGENA, GRAY, AND 
Conopus GUERBZA, Riiperetyt. By James Murisg, M.D., 
PROoSECTOR TO THE SOCIETY. 
The distinctive relation of the group of Indian Monkeys first 
generically arranged by M. Fréd. Cuvier* under the name of 
Semnopithecus, chiefly upon the essential character of a quinque- 
cuspidate posterior molar, has been subsequently, and on better 
* €Histoire Naturelle des Mammiféres,’ &c., livr. 30. 
