XIX.] 



PRIMA TBS. 



31, 



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

 well for grasping vertically-placed bouglis 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- 



Vk',. ri5. — Right pes of Ta^sius spcctfitut (nat. size), n ^istragalus ; c calcanenm 

 « navicular; c^ internal cuneiform; c^ middle cuneiform; c3 external cuneiform 



cb cuboid ; i to v the digits 



tinguished 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 Leimirina resembles 

 generally that of the Simiijia^ and is in fact one of the 



