CORRELATION AND HOMOLOGY. 



33 



Table 16. 

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



Homologous 

 Joints. 



Coefficient. 



Excess, 



Coefficient. 



Non-homologous 

 Joints of same Leg. 



Carpopodite i 

 with carpo- 

 podite II 

 ibb'). 



Carpopodite 

 II with car- 

 popodite III 



(b'b"). 



0.9069 ± 0071 



± .0084 



- (6.65) 



- (6.77) 

 -(0.14) 

 + ( -32) 

 -(1.79) 

 -(1.32) 

 + (1.15) 

 + (1.05) 



0.9588 ± 

 .9677 ± 

 .9083 ± 

 .9036 ± 

 .9083 ± 

 .9036 ± 

 .8742 ± 

 .8757 ± 



0.0032 

 .0025 

 .0070 

 .0074 

 .0070 

 .0074 

 .0095 

 .0093 



Carpopodite i with 



meripodite i (6a). 

 Carpopodite i with 



propodite i (be). 

 Carpopodite ii with 



meripodite ii (b'a'). 

 Carpopodite ii with 



propodite ii (6'c'). 

 Carpopodite ii with 



meripodite ii [b'a'). 

 Carpopodite ii with 



propodite ii (b'e' ). 

 Carpopodite in with 



meripodite in (b"a"). 

 Carpopodite iii with 



propodite in (6"c"). 



(B) CARPOPODITES OF LEGS I AND III (NON-CONTIGUOUS METAMERES). 



Carpopodite i 

 with carpo- 

 podite III 



{bb"). 



0.8685 ± 0.0099 



(8.68) 

 (9.73) 

 (0.42) 

 ( .53) 



0.9588 ± 0.0032 

 .9677 ± .0025 

 .8742 ± .0095 

 .8757 ± .0093 



Carpopodite i with 



meripodite i (ba). 

 Carpopodite i with 



propodite i [be). 

 Carpopodite in with 



meripodite in (b"a"). 

 Carpopodite in with 



propodite in (6"c"). 



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. 



