48 
A. Vertical sec 
18 
2 
3 
4 
5. 
6 
tf 
8. 
ZOOLOGY 
tion of Hydra. 
Ectoderm. 
Endoderm. 
Mesogloea. 
. Mouth. 
Coelenteron. 
. Hypostome or oral cone. 
. Pseudopodia of endoderm 
cells. 
Flagella of endoderm cells, 
9 and 9’, 
. Two buds 
Large and small nemato- 
cysts. 
in different 
stages of development. 
. Ovary. 
. Single ovum. 
. Testis. 
B. Portion of transverse section through 
body wall of Hydra, more highly 
magnified. 
