THE OCYMBULIA. 3438 
A Goop example of the Pteropoda is the large-winged Cymputia. Thouch oreatly 
e . . . . = ee a re S. =) ; y 
resembling the carinaria in general appearance, it is divided from that creature by many 























































































































































































































WING-FOOTED MOLLUSK.—Preropoda. 
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. 
