PRIMATES FROM MADAGASCAR. 



149 



The great extent to which the supraoccipital enters into the skull-roof has been 

 urged against the association of the Lemurs with the higher Primates ; but, as we 

 have seen in both Palceopropithecus and Mesopropithecus, the lambdoidal suture is but 

 very little removed from the occipital crest, and examples may be found among the 



Text-fig. 43. 



Showing form of foramen magnum and comparative size and shape of occipital condyles in Lemurs and 

 Monkej'S : — A & B. ArcJimolemwr edwardsi ; C. Archceolemw platyrrhinus ; D. PropitJiecufi ; E «& F. 

 Paloeopropiihecus ; G. Mesopropithecus ; H. Lemur jullyi ; I & J, Megaladapis ; K. Papio ; L. Colohus. 



Text-flg. 44. 



Showing extent to which occipital bone enters into cranial roof in : — A. Mesopropitliecus pitlieeoides ; 

 B. Lepidolemur : C. An Old "World Monkey (Cercopitheeus denti). 



Monkeys in which the extension of this bone along the median line of the skull-roof 

 is quite as great (text-fig. 44). 



Frontal Region. — The small backward extension of the frontal bone along the 

 skull-wall is another character said to differentiate the Lemurs from the Apes ; but 

 in this case, again, our fossils furnish instances in which this feature will compare 



x2 



