IXDEX TO PLATES. 33 



figures, with the closed \imbilicus, represents the variety 

 separated by Mr. Sa}-, under the name of ff. fratenta. The 

 second series repi-esents the H. Leai, Ward JIS. The 

 third and fourth represent different sizes of the typical 

 form. p. 147. 



PLATE XLII. 



Fig. 1. Helix demissa Binney, p. 232. 



Fig. 2. Helix mobiliana Lea, p. 172. 



Fig. 3. Helix hiksuta Say. Small, subglobular 

 form. p. 150. 



Fig. 4. Helix iiirsuta Say. Large, discoiJal ibrm. 

 Lingual booklets, p. 152. 



PLATE XLHL 



Helix buffoxiana Pfeiffer. This plate was un- 

 fortunately lettered " Helix aspersa," before it was discov- 

 ered to be different from that shell, p. 115. 



PLATE XLIV. 



Fig. 1. Helix si>inosa Lea, p. 153. 

 Fig. 2. Helix Edgariana Lea, p. 155. 



PLATE XLV. 



Fig. 1. Helix Texasiaxa Moricand.p. 191. 



Fig. 2. Helix inflecta S ay , (lettered tig. 3, in text.) 

 p. 143. 



Fig. 3. Helix INFLECTA Say. Regarded as the young 



of fig. 2. Probably H. triodontcu Jan. 



PLATE XL^Tl. 

 Helix poltchroa Binney, (erroneously lettered 



VOL. III. 5 



