PLATE 6 
EXPLANATION OF FIGURES 
21 and 23 Gill-plate prophases of class II. Chromosomes ‘,/Y figure 21, inter¬ 
preted as one; ‘i,’ figure 23, as two (p. 12). 
22 A peritoneal complex with part of the chromosomes missing. 
24 A peritoneal complex separated into two parts. The pair numbers are 
duplicated in figure 31 and in the legend of figure 37. 
238 
