26 INDEX TO PLATES. 



PLATE VI. 



Fig. 1. HELIX NICKLINIANA Lea. H. Calif orniensis, 

 Reeve, Conch. Icon. f. 661. The centre figure is regarded 

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



Fig. 2. HELIX CALIFORNIENSIS Lea. If. vincta, 

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

 Icon. fig. 660. p. 121. 



PLATE VI a. 

 HELIX NICKLINIANA Lea, full-sized specimens, p. 119. 



PLATE VII. 



HELIX PENNSYLVANIA Green, p. 105. 



PLATE VIII. 



HELIX HORTENSIS M ii 1 1 e r , represents the plain, un- 

 banded variety, (Jf. sub-globosa, Binney.) To the cis- 

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

 Bay, Newfoundland," whence I have received four diffei'- 

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



PLATE IX. 



HELIX ELEVATA Say, p. 126. 



PLATE X. 

 HELIX EXOLETA S a y , p. 131. Lingual booklets, p. 200. 



PLATE XI. 



HELIX THYROIUUS, Say, p. 129. Lingual booklets, 

 p. 131. 



