THE CYMBULIA. 



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A GOOD example of the Pteropoda is the large-winged CYMBULIA. Though greatly 

 resembling the cariuaria in general appearance, it is divided from that creature by many 



WIHG-FOOTKD MOLLUSK.-Pfero/wdo. 



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. 



