INDEX TO PLATES. 31 



PLATE XXXII. 



Helix lucubrata Say. Reeve seems to have taken 

 this for H. fuUginosa. Couch. Iconica, fig. 675. p. 225. 



PLATE XXXIIL 



Helix subplana B i n n e y , p. 229. 



PLATE XXXIV. 



Helix inornata Say. Lingual booklets, after the 

 description undetermined, p. 227. 



PLATE XXXV. 



Helix ligera Say. Lingual booklets appended are 

 unknown, p. 204. 



PLATE XXX VL 

 Helix inteetexta B i n n e y , p. 206. 



PLATE XXXVIL 



Fig. L Helix suppress a Say, p. 253. 

 Fig. 2. Helix lasmodon Phillips. Accompanying 

 lingual booklets undetermined, p. 254. 



Fig. 3. Helix gularis Say, small variety, p. 250. 

 Fig. 4. Helix gularis Say, large typical form, p. 250. 



PLATE XXXVIIL 



Helix septemvolva Say. The vertical series repre- 

 sents the typical form. The lateral figures represent the 



