168 H. H. NEWMAN 



b. Correlation for the total number of scutes in the 10 tail rings 

 for 20 sets of female quadruplets {79 individuals) 

 Mean = 167 scutes 



ax = 7.095; (ra;- = 50.35 

 av"' = 7.2307 

 Substituting, wp get: 



r = 1 - 1 ^^^ = 0.9282 ± 0.0093 

 2 50.35 



2. UNIPARENTAL CORRELATIONS IN THE CAUDAL ARMOR AS A 



WHOLE 



a. Correlation for the total number of scutes in the 10 tail rings 

 between 20 sets of male fetuses and their mothers 



Mean of mothers = 168.7 scutes 



o-x of mothers = 6.604; ax- = 43.61 



a-v^ between mothers and offspring = 72.32 



^ 43^61 + 36.87-72^ ^ ^ ^^^^^ 



2(6.604x6.072) 



b. Correlation for the total number of scutes in the 10 tail rings 

 between 20 sets of female fetuses and their mothers 



Mean of mothers = 169.9 scutes 



(jx of mothers = 7.38; ax- = 54.49 



av- between mothers and offspring = 60.59 



54.49 + 50.35 - 60.59 ^ .^., ^ . ^..^ 

 T-xy = 7 ^ = 0.4261 ± 0.0558 



2 (7.38 X 7.095) 



These results bring out the following facts: 



1. Polyembryonic correlation for the taU armor is of the same 

 order as that shown to obtain for the banded region, the former aver- 

 aging for males and females 0.9109, the latter 0.9211. Later it 

 will be shown that this same high order of correlation obtains for 

 all armor regions and for certain other characters of an entirely 

 different sort. 



