_ 
HEREDITY, AND THE ORIGIN OF SPECIES. 23 
the previous epoch. It certainly offers a most alluring field 
for research, and will doubtless soon receive attent#on. 
3 g 
Bg 
Ee a3 Re Re 
po 
ry 
AHS, | 
re ee 
$ iN 
1 
; 4 
45 t \ 
3 
ae 
40 
! ' 
25 H t 
1 
} t 
' 
' 
5 
ray 1 
mt 1 
7 
' 
¢ 
25 
H 
1 
20 \ 
T 
1 
1 
1 
3 
1 
1 
ay 
1 
1 
: 
eae Ska tae! Danae 
Sidon 
\ 
5}+-—+ sy yl 
Al WLM 
AA es y & 
20 a bs) 40 45 50 “BB 
na, 
<< 
Range of Variation of the Ratio of Width to ca es of Leaves 
in the Parental Lamarckiana and One of Its Mutants. The dotted 
line shows that the range in the parent is 28-53, with a coefficient 
= variability of 9.53 + 0.22 per cent., while in the mutant repre- 
by the solid line, the sang is 20-48, with a coefficient of 
vatisbiliy of 10.30 + 0.22 per 
Let us return to the question of the diversity of muta- 
tions which may ensue in any ph Theoretically a 
