164 



H. H. NEWMAN 



to table 6 (pages 874-875) of our former paper (Newman and 

 Patterson '11) for a good sample of the way in which scutes are 

 distributed into the individual bands. It will suffice to present 

 here a mere outline of the calculations used to determine the 

 various coefficients of correlation that obtain for three of the 

 bands (1, 5 and 9) taken as samples. 



a. Poly embryonic correlations for bands 1, 5 and 9 in 20 male 

 and 20 female sets of quadruplets 



Band 1 



Band 5: 



Band 9: 



r 



(tX^ 



r 



crX- 



cry' 



r 



3.524 



3.766 



0.4657 



3.488 



4.45 



0.3625 



4.624 



3.888 



0.5796 



0.0576 



0.0649 



0.0482 



b. Parental correlations for bands 1, 5 and 9 in 20 male and 20 

 female sets of quadruplets 



Band 1 : Mean of mothers {x) = 62.35 scutes 



Mean of offspring iy) = 62.06 scutes 



ax^ = 3.025 



crt/2 = 3.524 



c7z;2 = 3.593 



r^y = 0.4542 ± 0.0598 

 Band 5: Mean of mothers {x) = 61.32 scutes 



Mean of offspring {y) = 61.13 scutes 



crx2 = 3.269 



a?/2 = 3.488 



av' = 4.65 



r^y = 0.3114 ± 0.067 

 Band 9: Mean of mothers (x) = 64.18 scutes 



Mean of offspring (y) = 64.23 scutes 



<TX' = 4.288 



crz/2 = 4.624 



av"- = 6.742 



r,v = 0.5964 ± 0.0434 



