16 AN ANALYSIS OF THE EFFECT OF SELECTION. 
The effectiveness of selection is doubtful, but the line runs con- 
sistently lower than the three plus lines, and reversed selection was 
perhaps effective. 
TaBLE 12.—900, Inbred Minus Line. 
Generation. n M a T Diff. M 
Bye ecetas 130 | 4.769+0.045 | 0.77140.032 | ............08. +0.769 
Bgiice away 204 | 4.603+ .038 MTOR 9027) | ac escmsiaunen snes. + .603 
Beoearitvaciuces 256 | 4.578 .032 .767+ .023 — .021= .042 | + .976 
1. ee 194 | 4.959 .040 -818+ .029 + .155+ .048 | +1.000 
Fg asseeetass 243 | 5.1244 .037 847+ .026 + .0382+ .043 | +1.255 
Me scckihainad 103 | 4.660 .077 | 1.146 .054] ............... + .660 
Wee evas ee 148 | 5.000+ .044 797 .031 + .103= .055 | +1.986 
Haaisaveearecss 69 | 4.826 .070 .867 .050 + .159% .079 | — .420 
Fig eiewedt pao 271 | 4.576 .031 740% 022 — .005+ .041 | + .644 
PyOins.e ees 762 | 4.555 .019 769+ .014 — .0l1= .024/] + .654 
Fite enanues 340 | 5.141+ .031 849 .022 — .142= .036 | +1.340 
2,720 
REVERSED SELECTION. 
Figs eweeweiess 68 |4.897+ 0.062 |0.750= 0.044] ............... —1.103 
Fas Sec etaecsioes 71 (5.451% .062 | .728+ .044] ............... — .549 
Pipcaastacents 98 |5.194+ .032] .488= .023 |] ............... — .806 
237 
868 Minus Line. 
This line is descended from culture 868, which was produced by a 
sepia, Dichet, ebony-sooty female from 856 and a rough male from 
852; 856 was the result of mating a stock sepia, spineless, kidney, 
sooty, rough male to a Dichet ebony-sooty 
female from 840 (qg. v. above, in pedigree of 
900 line). 852 was a descendant of the peach, 
spineless, kidney, sooty, rough, and peach- 
ebony stocks, and (although it did not trace to 
the Dichet stock) of the same original cultures 
as 864, the ancestor of the first inbred plus line 
(see above). 
The offspring of 868 itself were classified for 
dorso-central bristles, as shown in table 13. 
TaBLe 13. 
Dorso- 7 
centrals. Offspring. 
0 25 
1 bit 
2 9 
3 0 
4 0 
Total..... 51 
The data for the succeeding generations are given in table 14 and 
figure 7. 
The numbers of individuals and of generations are rather small, 
for the reason that the line was not very vigorous, and finally died 
out in spite of all attempts to preserve it. It gave the lowest means 
of any line so far discussed. Reversed selection was apparently suc- 
cessful. 
