^6 MUTATIONS, VARIATIONS, AND RELATIONSHIPS OF THE OENOTHERAS. 



The coefficients of correlation are as follows : 



Length of 

 Length of 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 



ovary 



hypanthium . . . 



ovary 



cone 



ovary 



of ovary ... 

 hypanthium . . . 



cone 



hypanthium . , 

 of hypanthium 



cone 



of cone 



of ovary 



of hypanthium 

 of ovary ... 



of cone 



of hypanthium 

 of cone 



a 



- o 



- o. 



o. 



421 ±0. 



563 ±0. 



477±o 



564 ±0, 

 i57±o 

 S73±o 

 558±o 

 65i±o 

 5iS±o 



0440 



037 

 052 



037 

 052 



013 

 037 

 031 

 039 



387 ±0. 

 634±o. 

 600 ± o . 

 580 ±0. 

 044±o 

 .785±o 

 .573±o 

 . 569±o 

 ■ 532±o 



0430 

 032 o 

 0340 

 0350 

 0530 

 020 o 

 036 o 

 036 o 



I 

 0380 



472±o. 

 572±o. 



272±0. 



535±o. 

 i33±o 

 S29±o 

 556±o 

 59i±o 

 . 500 ± o 



041 o 

 0360 

 0490 

 0380 

 0520 

 017 o 

 0370 

 0350 

 040 o 



298±o.049 

 .598±o.o34 

 .596±o.o34 

 .375±o.046 

 .oi9±o.o5i 

 .835±o.oi6 

 .703±o.o27 

 .631 ±0.032 

 .7i7±o.o26 



Length of ovary , 



Length of hypanthium . . . 



Length of ovary 



Length of cone , 



Length of ovary 



Thickness of ovary 



Length of hypanthium . . . 



Length of cone 



Length of hypanthium . . . 

 Thickness of hyoanthium. 



Length of cone 



Thickness of cone 



Thickness of ovary 



Thickness of hypanthium . 



Thickness of ovary 



Thickness of cone 



Thickness of hypanthium . 

 Thickness of cone 



d 



221 ±0 

 246 + 

 336 ±0 

 507 ±0 

 i53±o 

 S40±o 

 5i4±o 

 501 ±0 

 .540±o 



0530 



052|0 



i 



0500 

 041 o 

 0550 

 016 o 



042 



o 



042 o 



• 035 



.o94±o 

 •534±o 

 .636±o 

 •527±o 

 .438±o 

 456±o 

 838±o 

 .475±o 

 .482+0 



/ 



.0560 

 .051 o 

 .042 o 

 .051 o 



■ 0570 

 .0560 



I 



.021 o 



.0750 



■ 05410 



624 + 0.043 

 638+0.034 



357±o.o5o 

 025 + 057 

 III ±0.050 

 837+0.017 

 ,640 ±0.034 

 584 + 0.038 

 555±o.o39 



A comparison of the coefficients of correlation in the characters of the sev- 

 eral mutants with those of the corresponding characters of Oenothera lamarck- 

 iana shows that in 14 cases out of 27 there is a decrease of correlation in the 

 mutant ; ini 2 instances there is an increase, and in i the correlation remained 

 the same. These results seem to negative the view that the characters of the 

 Oenothera mutants are generally less closely correlated than those of the parent. 

 However, the diflferences between the coefficients of the mutants and those 

 of Oenothera lamarckiana are not generally greater than those between the 

 several lots of 0. lamarckiana, or between the two lots of 0. ruhrinervis, and 

 it is evident that the question is still to be considered undecided, but with 

 the burden of evidence in favor of the view that little or no change takes place 

 in the correlation of parts when mutation changes their proportions. 



