PLatE LIX 
<<] 
2s 
St 
e 
5s 
15 
e 
8s @ eae 
- 
a 
os 
- 
4s 
Pad 
-—" 
6 
4% 
15 
~ 
7s 
eee i 
7 
$i 
3s bad am 
ae | 
B 
(a) The nucleus of a microsporocyte of C. gigantea at pachytene. 
Differential staining of eu- and heteropycnotic regions is clearly seen. 
(b) A camera lucida drawing of the same nucleus. 5=short arm; 
L=long arm; open circle =centromere; broken circle = nucleolus. 
