aperture of ovicell 
D zooecium 
alveoli 
young ca 
alveolus 
partly clos 
open alveolus-.. 
roof of 
”/ ovicell 
V // 
growing edge 
basal lamina m 
tenicuU-cs 
cavitiy of 
ovicell 
pnasyruc 
--- dcsc. 
