472 
Selective Elimination in Staphylea 
would be that the difference in the variability of C and A would be less than that 
of either of the other two differences. 
This is precisely the condition which we find; for the total material the differ- 
ences B — A and C — B are in opposite senses and clearly significant with regard to 
the probable errors of their differences, while the difference between C and A 
cannot safely be regarded as significant. 
Returning now to the results for the individual shrubs, we note that so far as 
the signs give evidence it is that A and C are less variable than B, just as our 
hypothesis demands. For the differences for individuals which are significant with 
regard to their probable errors, there are 6 (A < B) and 6 (A > B). For C — B 
there are 5 (C > B) and 15 (C < B). Finally C— A gives 4 (C > A) and 13 (C < A). 
These results contain only a partial substantiation for our hypothesis, but no 
evidence directly against it. 
Only further research will show whether these conditions are generally found. 
Take next the results for total ovules per ovary. The comparison is made in 
Table X. 
TABLE X. Comparison of Standard Deviations of total Ovides per Ovary 
in the three Series. 
B \ 
C J3 
C A 
Number 
of 
Shrub 
Difference 
Diff. 
Difference 
Diff. 
Difference 
Diff. 
and 
and 
E diff. 
and 
Probable Error 
A aiff. 
Probable Error 
Probable Error 
E diff. 
11 
•156+ -082 
1-89 
•504+ •loe 
4^76 
•660+ -101 
6^51 
12 
■367 + -099 
3^71 
- •770+^080 
9^65 
- -040+ •m 
■32 
IS 
- -733+ -135 
5^43 
•782+^104 
7^49 
■005± ^153 
•03 
u 
■473± -197 
2^40 
- -626+ ^182 
3 43 
- •015+^156 
•10 
15 
- -250+ -109 
2^30 
•493+ •lis 
4^18 
•243+ •I 25 
1^94 
16 
•280+ -175 
1^60 
- ^480+ •165 
2^90 
- •020+^155 
•13 
17 
- -0351 •I 33 
•26 
■876+ ^153 
5^72 
•053fl63 
•32 
18 
•754+ •Ul 
5^36 
- •308+^136 
2^26 
•045+ •ISO 
•34 
19 
■250+ ^157 
1^59 
- •617 + ^143 
4 •SI 
- •037+^127 
•29 
20 
- -043+ -152 
•28 
- •511±^126 
4^05 
- ^055+ •I 33 
•41 
21 
- •409+^139 
2-94 
•178+^102 
r74 
- •231 + ^140 
1^65 
22 
- •305fl24 
2^45 
- ^100+ -192 
1-09 
- •041 + ^114 
•35 
23 
1^650+ ^271 
6^09 
- 1^900+ ^260 
7^32 
- •250+^163 
1^53 
2Jk 
■362 ± •178 
2-03 
- •891fl49 
5^97 
- •530+^134 
3^94 
25 
- •811 + •231 
3-52 
- •587+^151 
3-88 
-1^399+^217 
6^44 
27 
•085+ •180 
•47 
- •500+^152 
3^30 
- •041 + ^147 
•28 
28 
•007+^170 
•04 
- •789+^130 
6 05 
- -078+ •Ml 
•55 
29 
•243+ •127 
1^91 
- •244+^127 
1-92 
- •000+^119 
•00 
30 
•454+^108 
4^20 
- •,380+^106 
3^58 
•074+ -090 
•83 
31 
■273+ ^123 
2^22 
- •282+^123 
2^29 
•008+^114 
•07 
32 
•172 + ^124 
r39 
- •257 + ^108 
2-38 
- •086+^116 
•74 
33 
- ^050+ •138 
■36 
- ^121 + ^129 
•94 
- •171±^129 
133 
34 
•241 + -183 
1^.32 
- ^781 + •138 
5^67 
- -540+ •158 
3^41 
35 
- ^467+ ■188 
5^32 
•081fl73 
MO 
- •386+^090 
4^29 
37 
- •812±^194 
4^19 
- ^331+ -154 
2^15 
-M42+^185 
6^18 
38 
- ^078+ •098 
•80 
•932+ •ISO 
7^16 
•854+ -132 
6^46 
39 
- •041 + ^130 
•31 
•112+ -100 
1-12 
■071 + ^133 
•53 
40 
•033+ ^151 
•22 
- ^460+ •I 21 
3^81 
- ■427+^138 
3-82 
