2o INDEX TO PLATES. 



PLATE VI. 



Fie. 1. Helix Nickliniana Lea. H. Californiensis, 

 Reeve, Conch. Icon. f. G6L The centre figure is regarded 

 as a variety, hut may be a distinct species, p. 119. 



Fig. 2. Helix C.a.liforniensis Lea. H. vincta, 

 Valenc. Voyage de la Venus, pi. 1, fig. 2. Reeve, Conch. 

 Icon. fig. G60. p. 121. 



PLATE VI a. 

 Helix Nickliniana Lea, full-sized specimens, p. 119. 



PLATE Vn. 



Helix Pennsylvanica Green, p. 105. 



PLATE VIII. 



Helix hortensis Miiller, represents the plain, un- 

 handed variety, {H. siib-globosa, Binney.) To the cis- 

 Atlantic localities I am able to add " head of St. George's 

 Bay, Newfoundland," whence I have received four differ- 

 ently banded varieties, (1854.) p. 111. 



PLATE IX. 



Helix elevata Say, p. 126. 



PLATE X. 



Helix exoleta Say, p. 131. Lingual booklets, p. 200. 



PLATE XL 



Helix tiitroidus, Say, p. 129. Lingual booklets, 

 p. 131. 



