402 
MR. ST. GEORGE MIYART ON THE SKELETON OF THE PRIMATES. 
13. The angularity of the shaft of the femur, and strong projection of the lineaaspera. 
14. The predominance of that part of the rotular surface which is supported by the 
peroneal condyle. 
15. The absolute length of the tibia. 
16. The sharpness of the crest of the tibia 
17. The descent of the posterior border of the distal articular surface of the tibia (for 
the astragalus) below its anterior border. 
18. The much greater descent of the peroneal than of the tibial malleolus. 
19. The shortness of the pes compared with the length of the pelvic limb minus the 
pes, and compared with that of the tibia. 
20. The great breadth of the lowest part of the tuberosity of the os calcis, and the 
presence of two tubercles on its plantar surface. 
21. The flattened surface (for the hallux) of the entocuneiform bone. 
22. The fact that either the first or the second digit is the longest and most project- 
ing one of the pes. 
23. The absolute size of the hallux, both with and without its metatarsal, and espe- 
cially of its second phalanx. 
24. The very slight outward direction of the first metatarsal. 
25. The very obtuse angle (plantar one) formed by the transverse axis of the head of 
the first metatarsal, with a line passing transversely through the heads of the other 
metatarsals. 
26. The great proportion borne by the hallux to the longest digit. 
27. The small proportion borne by the four outer digits to the whole pes and to the 
metatarsals. 
28. The very slight flattening of the plantar surfaces of the phalanges. 
29. The narrowness and elevation of the distal ends of the four outer metatarsals. 
30. The great flattening beneath of the outermost metatarsal. 
31. The successive decrease , in length of the tarsus, metatarsus, and digits. 
32. The form and construction of the antero-posterior plantar arch. 
Simia. 
The Orang-outan, when compared with all the other Primates, presents the following 
notable conditions : — 
The proportion borne by the pectoral limb to the spine is greater than in any other 
genera of the order except Tarsius and Hylobates. 
The proportion of the length of the radius to that of the spine is greater than in any 
other except Hylobates. 
The length of the index, with its metacarpal, compared with the spine, is greater than 
in any except Tarsius and Hylobates. 
The length of the metacarpal of the pollex is greater, in proportion to that of the 
spine, than in any others except Hylobates and Tarsius. 
The spine of the ischium is more largely developed than in any other Primate except Man. 
