Habits and Osteology of a New Orang. 435 
want of strength in the pelvis, resulting from diminished articu- 
lating surface, and consequently a want of adaptation to sustain 
the erect position. 
*In the Chimpanzée the iliac bones are long, straight and 
expanded outwardly above, but narrow in proportion to their 
length ; the posterior face is concave for the lodgment of the 
glutei muscles, the anterior surface nearly flat, and stretching 
outwards almost parallel with the plane of the sacrum."' “In 
the Orang, the ilia are rather more expanded than in the Chim- 
panzée."* "The ilia of the Engé-ena make a much nearer ap- 
proach to the human type than either of the animals above- 
mentioned ; the space between the anterior spinous processes 
is proportionally larger, the wings are much broader, the ante- 
rior face has a deep concavity, the dorsum has a correspond- 
ing convexity, but is destitute of the semicircular lines indica- 
ting the origins of the glutæi muscles, and the superior spinous 
processes are farther in advance of the plane of the sacrum. 
The crest of the ilium is destitute of the curve like an F 
which is characteristic of the human pelvis. 
If, in the upper extremity, the Engé-ena approaches nearer 
. io man than his congeners in the relative lengths of the ulna 
and humerus, he recedes much farther in those of the humerus 
and femur. In the Chimpanzée the humerus and femur are 
almost exactly of the same length, but in the Engé-ena the 
 ^umerus exceeds the femur by three inches, a disproportion 
. “ery nearly the same as that which exists in the correspond- 
ing parts of the S. satyrus. As in the Chimpanzée, the h 
of the femur has an impression corresponding with the at- 
tachment of the round ligament, but the greater trochanter is 
Proportionally stouter, the shaft of the bone is more curved, 
od the inner condyle much longer, so that when the two 
condyles rest in a horizontal surface, the shaft of the bone has 
“inclination outwards as in man, instead of a direction nearly 
Vertical as in the Chimpanzée. 
Owen, 
.- WEB, Trans. Zool p. 5 
Ks og. Soc. Lond. vol. i. p. 351. 
Owen, Op. cit. p. 363. 
