XIX. j 



PRIMA TES. 



313 



ground, and the sole is directed inwards. This position suits 

 well for grasping vertically-placed boughs of trees, but is ill 

 adapted for standing or walking on the ground. A similar 

 disposition is seen in a varying degree in most of the 

 Monkeys, but in none so markedly as the Orang, in which 

 animal all the peculiarities by which the simian is dis- 



JV 



[5— Right pes of Tars/us spectrum (nat. size), a astragalus ; c calcaneum 

 « navicular; c 1 internal cuneiform; c 2 middle cuneiform; c3 external cuneiform 

 cb cuboid ; 1 to v the digits. * 



iguished from the human foot, are most strikingly 

 displayed. 



There are usually two sesamoid bones behind each 

 metatarso-phalangeal joint, and a single one behind the 

 cuboid in the tendon of the peroneus longus muscle. 



The structure of the foot of the Lemurina resembles 

 generally that of the Simiina, and is in fact one of the 



