Alice Lee 
319 
environment of the particular tree dealt with or (ii) to the period in the seasonal growth 
(February to April) at which the needles were measured. 
An examination of Dr Ludwig's polygons on p. 22 seems to suggest that the classification of 
"lower," "middle" and "upper" branches is not a very satisfactory one. There may be some 
more fundamental classification having relation to position on branch or to light and shade, 
and the "lower," "middle," and "upper" branches, while having needles belonging to all these 
classes, have a greater frequency of one or other class peculiar to themselves. 
The coefficients of variation are somewhat greater than have been found for the ash, beech 
or chestnut (number of veins in leaves), but almost the same as for the variation of prickles on 
the leaves of holly*. 
1 have noticed the following errata in Dr Ludwig's paper. Table E, p. 15, totals in last row, 
for 56 read 55, for 45 read 44, for 24 read 23: Table H, p. 16, totals in last row, for 29 read 24. 
In the Table of Pinus silvestris, p. 21, the total at the bottom of column headed 11 should be 47 
and not 46. 
Variation in Ray-flowers of Chrysanthemum leucanthemum, 1133 heads 
gathered at Keswick, during July, 1895, by K. Pearson and 
G. U. Yule. 
The following table gives the unreduced raw material : 
* Phil. Trans. Vol. 197, A, p. 361. 
Number 
of Kays 
Frequency 
Number 
of Rays 
Frequency 
11 
12 
IS 
H 
15 
16 
17 
18 
19 
20 
21 
22 
23 
1 
3 
23 
36 
36 
46 
46 
77 
78 
151 
286 
132 
63 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
Sit 
35 
33 
33 
24 
16 
6 
11 
5 
10 
4 
11 
1 
1 
Total 
1133 
