32 INDEX TO PLATES. 



small variety. A lamellar fold, beginning about one fourth 

 of a volution within the aperture, and running somewhat 

 obliquely about half a volution along the columellar side, 

 has not hitherto been specified in descriptions, though it has 

 been noticed by several observers ; and distinguishes this 

 shell from H. paludosa, and other West Indian species, 

 p. 196. 



PLATE XXXIX. 



Fi"-. 1. HELIX SEPTEMVOLVA Say. The small con- 



O * 



vex variety, p. 198. 



Fig. 2. HELIX PLICATA Say, (should be H. fatiyiata 

 Say,)p. 193. 



Fig. 3. HELIX PUSTULA Say, p. 201. 



Fig. 4. HELIX FATIGIATA Say. The large, flattened, 

 carinated variety, p. 195. 



PLATE XL. 

 Fi" 1 . 1. HELIX AUKICULATA Say. The mature shell. 



O " * 



p. 186. 



Fig. 2. HELIX AUKICULATA Say. The young shell, 

 described by Say under the name of Helix avara. Lin- 

 gual booklets, p. 189. 



PLATE XL a. 

 Fi-. 1. HELIX LEPORINA Gould. The annexed cut 



O 



of lingual booklets is that of H. exoleta. p. 199. 

 Fig. 2. HELIX MAXILLATA Gould, p. 157. 

 Fig. 3. HELIX GEKMANA Gould, p. 156. 

 Fig. 4. HELIX VULTU'OSA Gould, p. 189. 







PLATE XLI. 

 HELIX MONODON Rackett. The upper series of 



