336 Kneeland on the Skeleton of the Great Chimpanzée. 
Arr. XXI. — On the Skeleton of the Great Chimpanzée, Tro- 
glodytes gorilla. Read before the Boston Society of 
Natural History, April 21st, 1852. By S. Kxrrrax», Jr., 
M. D. Boston. . 
Tue Society has recently received a most valuable addition 
to its Cabinet, in a nearly complete skeleton of the Troglo- 
dytes gorilla, presented by the American Board of Commis- 
sioners for Foreign Missions. It consists of a fine skull, with 
lower jaw, with the teeth complete; all the vertebrze except 
the atlas; the pelvis complete; both scapula and clavicles; 
the entire humerus, radius, and ulna of left side, the ulna of 
the right side with the humerus and radius broken ; the femur 
and tibia of right side, and the head and upper portion of 
shaft of the left femur ; all the ribs, a few bones of the hand, 
and the manubrium of the sternum. 
The cranium is of great size and strength ; the internal 
capacity is only twenty-seven cubic inches, while that of 
another specimen belonging to the Society is thirty-five cubic 
inches. Prof. Wyman gave the measurement of the last as half 
an inch less; this trifling difference may be owing to my using 
smaller shot, and perhaps pressing them down a little more 
closely. From the capacity, from the great development of 
the sagittal and lateral crests, and the massive character of 
all the bones, this is undoubtedly a male; the appearance of 
the jaws, the complete development and worn surfaces of the 
teeth indicate an adult, if not an old animal. The sutures 
are hardly discernible, as usual; the superciliary ridges and 
crests are exceedingly well developed. The specific characters 
pointed out by Professor Agassiz, in the decreasing depth o 
the infra-orbitar canal from before backwards, and the pro- 
jection outwardly of the inner walls of the orbits, are well 
seen on this specimen. There are two infra-orbitar foramina 
on each side. The nasal bones are united together, in the 
lower half presenting traces of a median suture, in the upper 
half a prominent ridge ; the portion of the bone between the 
