36 INDEX TO PLATES. 



PLATE LIV. 



BuLiMus ZEBRA M ii 1 1 e r . Common forms, young and 

 old. The large variety, with the animal, intended for 

 Plates LIL. LIII., Lave been omitted, p. 271. 



PLATE LV. 



Bdlijius fasciatcs M ii 1 1 e r . A solid, nearly color- 

 less variety, described by Mr. Say as Acliatina solida, 

 young and old. p. 266. 



PLATE LVI. 



BuLiMus FASCIATUS. Varieties, p. 268. 



PLATE LVII. 



BuLiMUS FASCIATUS. The variety described as Acha- 

 ina crenata, by Swainson. p. 268. 



PLATE LYIII. 



BcLiMus viRGULATrs Ferussac. p. 278. 



PLATE LIX. 



Glandina truncata Say, p. 30L With the animal. 

 Extremity of the lingual organ, magnified, p. 297. A por- 

 tion of the organ still more largely magnified, p. 303. 



PLATE LX. 



Glandina truncata Say, Ordinary forms, p. 301. 



