214 



MR. ST. G. MIVAET ON THE SKELETON OE 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 Nycticehinm and perhaps Indris. 



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 poUex ; the 

 great difference between the length of the poUex and that of the index ; the large 

 diameter of the acetabulum compared with the length of the spine ; the small pro- 

 poi'tion 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 tlie head of tlie 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 tlie 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 the 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. 



' 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, 3 B, and 3 C. 



