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THE CRANIA OF THE SIMIIDAE (PRIMATES) [SECT. A 



South American form). If this be so, Chrysothrix is distinguished 

 in this way not only from the other Primates, but from a large 

 number of other mammals. 



But the question now arises, How is such a reversal of the 

 relative position and inclination of the foramen magnum brought 

 about ? In reply to this enquiry, attention is directed to three 



