THE PADOGENETIC FLY, MIASTOR 53 
gradually becoming reduced as the odcytes increase in 
size. Finally the odcyte (and accompanying nurse 
cells), still surrounded by the follicular epithelium, 
Fic. 12.— Miastor americana. Longitudinal section through an ovary. 
en=envelop; f.ep = follicular epithelium; n.c =nurse chamber; 
n.¢e.n = nurse-cell nucleus; 0.m = mesoderm; odc.n = odcyte nucleus. 
Fic. 13.— Miastor americana. Longitudinal section through a nearly 
full-grown odcyte. g.v = germinal vesicle; n.c = nurse chamber; 
pFPl = pole-plasm. 
