148 



CHARLES MIDLO AND HAROLD CUMMINS 



interdigital I and II instead of Th and I ; with this shift there 

 is of course a reversal to right ascendancy of Th in this group. 

 The gibbon presents no single region with left superiority. 



Fifurc 602 



Regional Bilateral Differences 

 in Pattern Intensity - 



R... e.x.cess in right member. 



L . . . excess in left member. 



O no bilateral difference, though patterns are _pfesenl . 



Symbols . . . are not entered in reoions lacking patterns . 



New World 

 rionkeys 



Old World 

 Monkeys 



Gibbon 



Great Apes 



Man 



In considering the sole, again man may be mentioned first. 

 The small magnitude of bilateral difference, as well as the 

 inconsistency of the direction of difference in various samples 

 (table 6), indicate a lesser degree of asymmetry than that 

 of the palm. They indicate, too, the need of great caution in 

 interpreting the differences observed in the smaller collections 

 of non-human primates. In the combined material, left 

 superiority is confined to Th d /I and II. The excess of pattern 

 intensity in Th d /I of left soles is undoubtedly significant, since 

 the discrepancy is repeatedly expressed in all but two of the 

 twelve racial samples. The left superiority of interdigital II 

 is less consistent among the samples. Reversal to right 

 superiority in "mongoloids" (Eskimos; three series of North 



