PLATE 1 
EXPLANATION OF FIGURES 
Apis mellifica 
1 Outline of an ovariole showing the terminal filament, ¢, a zone containing 
rosettes of cells, 7, a zone of differentiation, d, a region containing a linear series 
of oocytes, 0, and nurse cells, n, accompanying an oocyte. > 110. 
2 Part of the rosette region of an ovariole; 7, a rosette, the cells of which 
are held together by deeply staining strands; e, an epithelial cell nucleus. 650. 
3 <A single rosette in longitudinal section. X 1900. 
4 A single rosette in transverse section. X 1900. 
5 Synchronous division of the cells in a rosette. X 1900. 
6 Part of the zone of differentiation of an ovariole; 0, oocyte; e, epithelial 
cell nuclei; m, nurse cell. X 430. 
7 Two neighboring oocytes from the zone of differentiation showing the 
double rings connecting them with each other and with surrounding nurse cells. 
x 1900. 
536 
