Plesiadapis is one of the oldest known primate-like mammal
species which existed about 60 mya in Asia, Africa and South
America. It looked a little like a squirrel. Plesiadapis still had
claws and its eyes were located on each side of the head, making
them faster on the ground than on the top of the trees, but they
begin to spend long times on lower branches of trees, feeding on
fruits and leafs.
Source:
http://www.answers.com/plesiadapis?gwp=11&ver=2.3.0.609&method=3