ME. ST. GEORGE MIYAET ON THE SKELETON OF THE PRIMATES. 
403 
The length of the pes is greater, in proportion to that of the spine, than in any except 
Ateles, Cheiromys, and Tarsius. 
The proportion borne by the longest digit of the pes to the spine is greater than in 
any other Primate except Tarsius. 
The length of the longest digit, without its metatarsal, compared with that of the 
tarsus, is greater than in any of the order except the Nycticebinse and perhaps Indris. 
In addition to these more or less exceptional conditions, the Orang differs from every 
other Primate without exception in : — 
1. The great absolute length of the pectoral limb minus the manus. 
2. The small length of the pelvic limb minus the pes, compared with that of the 
pectoral limb minus the manus. 
3. The great absolute length of the manus. 
4. The great absolute length of the third digit of the manus, both with and without 
its metacarpal. 
5. The great absolute length of the metacarpal of the pollex. 
6. The great difference between the length of the pollex and that of the index. 
7. The large diameter of the acetabulum compared with the length of the spine. 
8. The small proportion borne by the femur to the humerus. 
9. The very obtuse angle formed by the neck of the femur with its shaft. 
10. The all but constant* absence of a pit for the ligamentum teres, on the head 
of the femur. 
11. The shortness of the tibia compared with the humerus. 
12. The length of the pes compared with that of the rest of the pelvic limb. 
13. The length of the pes compared with that of the tibia. 
14. The absolute length of the three middle metatarsals. 
15. The absolute length of the longest digit with its metatarsal. 
16. The very small proportion borne by the length of the hallux to that of the longest 
digit of the pes. 
17. The occasional absence of the second digit of the hallux. 
18. The great length of the index, with its metatarsal, compared until that of the spine. 
19. The small length of the hallux (both with and without its metatarsal) compared 
with that of the whole pes. 
20. The great length of the second digit, without its metatarsal, compared with that 
of the whole pes. 
21. The very similar length of the indices of the pes and manus, both with and still 
more without, the metatarsal and metacarpal. 
22. The shortness of the tarsus compared with the length of the pes. 
* It is occasionally absent in the Gorilla, as has already been mentioned ; but in the Orang I have only found 
it present in one out of fourteen skeletons examined, namely in the specimen No. 3i in the Osteological Col- 
lection of the British Museum. For this and other details concerning the appendicular skeleton of Simia, see 
Trans. Zool. Soc. vol. vi. p. 165, and pis. 25-43, especially pi. 40. fig. 7 i. 
MDCCCLXVII. 3 i 
