MONKEYS AND APE8, 
803 
That the lemurs, though now restricted to Madagascar, 
eastern Asia, and South Africa, were preceded by still more 
generalized types on the American continent, is indicated 
by the discovery of fossil bones in the Eocene beds of the 
Rocky Mountains, referred by Marsh and Cope to the Pri- 
mates; Marsh stating that the principal parts of the skele- 
Fia. 326.— Galago. From Lutken's Zoology. 
ton are ^^much as in some of the lemurs." The genus 
Anaptomorphus of the Western Tertiary beds is a small 
lemur-like form, said by Cope to be the most like the apes 
of any yet discovered. 
Allied to the true lemurs is a very puzzling creature, the 
aye-aye or Chiromys, of Madagascar, whose dentition dif- 
fers from that of all other Primates, and resembles that of 
the Eodents; the thumb also is not truly opposable, and 
all the hind digits, except the great toes, have claw-like 
