150 



CHARLES MIDLO AND HAROLD CUMMINS 



The human sole, like the palm, compares most closely with 

 the sole of New World monkeys (fig. 602), where the dis- 

 crepancy involving plantar interdigitals II and III is probably 

 insignificant, indicating that there is no real difference in the 

 bilateral plantar asymmetries of man and New World 

 monkeys. Both man and New World monkeys exhibit a zone 

 of left superiority confined to a limited disto-tibial region. 

 A curious reversal of this condition occurs in the great apes, 

 where there is a similarly limited region of left superiority 

 lying in the disto-fibular zone and involving H d and interdigital 



Table 7 

 3imanual Comparisons in Pattern Intensity 



* Double, entries indicate variable, numbers available for the determinations 

 of the several regions 



IV. The soles in Old World monkeys and in gibbon present 

 diagonal fields of left superiority separating two zones of 

 right superiority, but in these groups the regions involved 

 are essentially reversed. 



Comparison of regional asymmetries of palm and sole in the 

 same group or genus discloses resemblances and differences 

 which are suggestive of varying intermembral specializations. 

 The zones of right and left superiority are in virtual agree- 

 ment in palm and sole only in Old World monkeys, the group 

 containing the pronounced walkers. Next in order of inter- 



