464 
J . Osawa 
T. platycarpum. T. albidum. 
longer 
shorter 
aver. 
longer shorter 
aver. 
axis. 
axis. length. 
axis. 
axis. length. 
7.5 
: 5.5 = 
6.50 
10.0 : 
6.0 = 
8.00 
7.5 : 
: 5.0 = 
6.25 
10.5 : 
: 6.0 = 
8.25 
7.0 : 
: 5.5 = 
6.25 
9.5 
: 7.0 = 
8.25 
7.0 : 
: 6.0 = 
6.50 
9.0 : 
: 7.5 = 
8.25 
6.5 : 
: 5.5 = 
6.00 
11.0 
: 6.5 = 
8.75 
6.5 : 
: 6.0 = 
6.25 
8.5 
: 7.0 = 
7.75 
8.0 : 
: 4.5 = 
6.25 
9.0 
: 6.5 = 
7.75 
7.0 
: 6.0 = 
6.50 
10.0 
: 6.5 = 
8.25 
6.5 
: 6.5 = 
6.25 
9.0 
: 6.5 = 
7.75 
6.0 
: 6.0 = 
6.00 
9.0 
: 7.0 = 
8.00 
6.0 
: 5.5 = 
5.75 
8.0 
: 7.0 = 
7.50 
6.5 
: 5.5 = 
6.00 
9.0 
: 7.0 = 
8.00 
8.0 
: 5.0 = 
6.50 
9.0 
: 8.0 = 
8.50 
7.0 
: 5.5 = 
6.25 
9.0 
: 6.5 = 
7.75 
6.5 
: 5.0 = 
5.75 
8.5 
: 7.0 = 
7.75 
7.0 
: 5.0 = 
6.00 
9.5 
: 7.5 = 
8.50 
6.5 
: 6.0 = 
6.25 
10.5 
: 5.5 = 
8.00 
8.0 
: 5.0 = 
6.50 
9.5 
: 6.0 = 
7.75 
7.0 
: 4.5 = 
5.75 
8.5 
: 7.5 = 
8.00 
6.0 
: 4.0 = 
5.00 
8.5 
: 7.0 = 
7.75 
7.0 
: 5.0 = 
6.00 
9.0 
: 7.5 = 
8.25 
7.5 
: 5.5 = 
6.50 
9.0 
: 7.0 = 
8.00 
8.0 
: 5.0 = 
6.50 
9.5 
: 6.5 = 
8.00 
7.0 
: 5.5 = 
6.25 
9.0 
: 6.5 = 
7.75 
6.5 
: 5.5 = 
6.00 
9.0 
: 7.0 = 
8.00 
154.00 
200.50 
From the above table we see tliat the ratio of the average lengths 
of tlie two axes of nuelei in T. albidum and T. platycarpum is 
200.5 : 154 or 4.01 : 3.1. The ratio of their volumes is therefore 
^ tc (4.01) 3 : ~ n (3.1) 3 or 64 : 29.79 or 2.18 : 1. From this we see 
that the ratio of the volumes of the nuelei nearly eorresponds to tliat 
of the number of chromosomes; moreover in T. ofjicinale, which 
contains in their nuelei 26 chromosomes as haploid number, the nucleus 
appears to lie in its size between these two species, so far as I can 
judge from Juel’s illustrations 1 ). 
*) For example , 1 . c . Taf . II , Figs . 26 , 27 . 
