143 



CYMBULIA. 



Ann. dn Mm. 15, p. 66, pi. 3, /. 10, 12. W-f. 



A cartilaginous shell of crystalline transparency, 

 and firm consistency, in the form of an oblong slipper, 

 or wooden shoe, (sabot of the French), truncated at the 

 summit, with a lateral opening at the anterior end. 

 Cymbulia Perronii. 



PNEUMODERMON. 



Ann. du Mus. 15, p. 66, pi. 3,f. 10, 12. 



A molluscous animal without any testaceous covering, 

 and much resembling the G. Clio. 



Pneumodermon Perronii. 



GLAUCUS. 



A molluscous animal without a shell. 

 Glaucus Forsteri. 



