Habits and Osteology of a New Orang. 437 
10. The ossa nasi are more narrow and compressed su- 
periorly ; 
11. The scapula is more nearly equilateral ; 
12. The ulna is shorter in proportion to the humerus; 
13. The ossa ilia are much broader, more concave on the 
anterior face, and the anterior spines project farther forward. 
The Engé-ena in the strength of the zygomatic arches, in 
the existence of the occipital and interparietal crests, and in 
the strength and size of the lower jaw, approximates the 
Orangs, but is readily distinguished from all those yet de- 
scribed, 
1. By its large superciliary ridges ; 
2. By the straight outline of the face ; 
3. By the existence of a fifth tubercle on the last molar of 
the lower jaw ; 
4. By the existence of a round ligament in the hip joint; 
9. By the more anthropoid conformation of the pelvis; 
at In having the cerebral cavity more depressed behind the 
ce; 
T. In having the ulna shorter than the humerus. 
It should be borne in mind that the above distinctions are 
Rot based upon observations made upon a single specimen, 
but upon the examination of four adult crania of the Engé-ena, 
. two males and two females, and upon six adult crania of the 
E é-eco. In no one of these last has there béen found 
any approach to an interparietal crest, nor have they in any 
instance deviated materially in their dimensions from those 
given i in the table. The temporal ridges are generally separa- 
ted from each other by a space varying from half an inch to 
* Of the adult ura of the himpanzée, t there are two in the Cabinet of the Bos- 
a Society of N: tual History, one in that of Dr. J. C. Warren, two in that of the 
rademy of Natural tural Sciences in Philadelphia, and one in my own collection, 
