INTRODUCTION TO PART V 



"^1 IE ami ot these c'()iu'lu(lin<j; chapters is to eonsKler eertaiii ciii est ions 



whose discussion may seem to ]ustil\' tlie deductions chaw n Iroin 



the laets as the\ ha\e been presentech 



The questions arc pnmarilv designed to gi\'e the e\ idenet' its hnal logical 



arrangement, to test, in so hir as ma} be possible, its validity. They have 



been lormulated as lollows: 



1. Does the appearance ol tlu' bram m prmiati's, including llu' lemurs, 

 monke\s, apes and man, show such similaritx ol structure as to indicate a 

 constanc\ which distinguishes them as a distinct and scfxirate order of 

 mammals? And does this hoiiiogt-iu'it \ ri'cene substantial ];rool in the 

 essential similarities ot beha\ior within this order? 



2. Do the structural pattc'rns ot the brain m these primati's manilest 

 j)rogressi\e modilications m harmoin with progressive adaptations in the 

 behavior of these animals? 



3. Do these progressi\'e modilications In stiuctuic and l)eha\ lor lustify 

 the e()nee|)tion ot an CNolutional process in conscciueiicc ot which tiinda- 

 mentallv simple structures haw become more complex in order that they 

 might impart to beha\ioral reactions an increasing rangx' ol adaplabihtx ? 



4. Does the primate bram indicate that man a\ as dci'i\ed Irom a series 

 ot preparatory pro-human stages and what relationship dot's it rewal 

 between man and the apes? 



The Position of the Primates among ihi- Mammals 



In considering these cjuestions it is lirst lU'ct'ssary to assign the primates 

 to their proper position among the mammals. They are but one ol many 

 contemporaneous mammalian orders. II, as is generall\ belicNcd, a period ol 

 time reaching back to the mci'ption ot the Tertiar\ period was required to 



