THE CYMBULIA 
343 
A good example of 
resembling the carinaria 
the Pteropoda is the 
in general appearance, 
large- winged 
it is divided 
Cymbulia. Though greatly 
from that creature by many 
WING-FOOTED MOLLUSK .-Pteropoda. 
important structural differences. Its shell is flexible, and in shape and translucency somewhat 
like the glass-slipper of fairy mythology, the point, or toe, being set forward. Only three 
species of this genus are known. 
