CORRELATION AND HOMOLOGY. 



33 



TABLE 16. 

 (A) CABPOPODITES OF LEGS I AND II, AND II AND III (CONTIGUOUS METAMERES). 



We have, finally, the data for the propodites in table 17, and here we 

 find that in the case of the propodite correlations there is nothing approach- 

 ing a uniform rule of higher correlation in the homologous joint pairs 

 over the pairs from the same leg. In seven cases out of the twelve 

 the pairs of joints from the same leg have the higher coefficient, and in 

 five the opposite relation holds. No stress can be laid on such a small 

 majority, however. Turning to the amounts of the individual differences, 

 we find for the plus difference ratios a mean value of 5.76 and for the 

 minus ratios a mean of 3.70. The plus differences are clearly the larger 

 on the average. 



