214 MR. ST. G. MIVART ON THE SKELETON OF THE PRIMATES. 
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 Nycticebine and perhaps Jndris. 
The Orang differs from every other Primate without exception in:—the great 
absolute length of the pectoral limb minus the manus, of the manus itself, of its third 
digit both with and without its metacarpal, and of the metacarpal of the pollex; the 
great difference between the length of the pollex and that of the index; the large 
diameter of the acetabulum compared with the length of the spine; the small pro- 
portion borne by the femur to the humerus; the very obtuse angle formed by the 
neck of the femur with its shaft; the all but constant absence of the pit for the 
ligamentum teres on the head of the femur; the shortness of the tibia compared with 
the humerus; the length of the pes compared with that of the rest of the pelvic limb ; 
the length of the pes compared with that of the tibia; the absolute length of the three 
middle metatarsals; the absolute length of the longest digit with its metatarsal; the 
very small proportion borne by the length of the hallux to that of the longest digit of 
the pes; the occasional absence of the second digit of the hallux; the great length of 
the index, with its metatarsal, compared with the length of the spine; the small length 
of the hallux (both with and without its metatarsal) compared with that of the whole 
pes; the great length of the index, without its metatarsal, compared with that of the 
whole pes; the nearly equal length of tle indices of the pes and manus, both with and 
without the metatarsal and metacarpal; the shortness of the tarsus compared with the 
length of the pes. Thus the Orang is one of the most peculiar and aberrant forms to 
be found in the order Primates. 
DIMENSIONS AND PROPORTIONS. 
~ Scapula. 
Length pon top| Greatest Greatest 
of glenoid surface! _ Length Length Length length of | breadth of 
to inferior yer. | Of axillary | of vertebral | of superior glenoid glenoid 
tebral angle. aa Hi are HERE surface. surface. 
INO: Subse asc 7-45 6°7. 5°75 3°65 1:65 1:07 
sx OLB iiats wie Heuwe 7-00 6-45 5:20 3-70 1:55 1:00 
BS Ga oee ee me 7-50 6-90 6:00 3°40 1-75 nlc 
Average of the 7-31 6-70 5-65 3:58 1-65 1-08 
three Ah area 
Variety Morio .. 5-49 4-82 3°98 2.98 1:22 0-81 
1 The skeletons which have been selected for measurement are those of three adult males in the Osteological 
Collection of the British Museum, and numbered respectively 3 A, 3B, and 3C. 
