482 
Selective Elimination in Staphylea 
For the grand totals the results are : 
Mean asymmetry, Lot A = --i515 + •0051, 
Mean asymmetry. Lot B = -4415 ± -OO-iS, 
Mean asymmetry, Lot C = -3724 + -0045, 
B— A = - -0100 + -0070, 
C— B - - -0691 + -0066, 
C— A = - -0791 + -0068. 
The first difference is probably not significant ; the second and third are over 
ten times their probable errors. 
The difference in the distributions of asymmetry for the eliminated and the 
matured series is rather strikingly shown when the frequencies for the two series 
are reduced to percentages and plotted in a polygon. In Diagram 5 the 
relatively few asymmetries of 1'2472 and over have been graphed together. 
•0000 '4714 -8165 '9428 1-2472+ '0000 '4714 '8165 '9428 r2472 + 
Series A. Eliminated. Series C. Matured. 
Diagram 5. Percentage frequencies of chief asymmetry classes in the eliminated 
and matured series. 
Whatever way we arrange our data the conclusions flowing from them are 
the same — that the radial asymmetry of the ovaries which develop to maturity is 
less than that of those which are eliminated. 
