Biiiney un Terrestrial Mullusks. 117 



IIKLIX ELECTRINA Gould vol. ii. p. 236, pi. xxix. fig. 1. 



Pfeiffor (Symb. ii. 10) considers this a variety of nitidosa, 

 but subsequently refers it to pnra, as does also Reeve. 

 It has also been detected in Georgia and New York. 



HELIX OTTONIS Pfeiffek vol. ii. p. 2.38, pi. xxix. a, fig. .3. 



Also considered a synonym of arborea by Reeve, (No. 

 73-3.) See the remarks under H. arborea. 



HELIX STEENSTRUPII Mokch. 



In Morch's catalogue of Greenland Mollusca (Rink's 

 Greenland, p. 75) occurs the following mention of this 

 species, which is the only information I can obtain in 

 regard to it. (See also H. Fabricii.) 



HeliceUa Steenstrupii, N. s. 

 Helicella sp. Stp. Conch, von Island. 

 Helix nitida Fabr. F. Gr. No. 385. 

 Helix alliaria Forbes, Br. Ass. 1839, 142. 



HELIX CAPSELLA Gould vol. ii. p. 239, pi. xxix. a, fig. 1. 



Helix rotula Pfeiffer, Men. Hel. Viv. iii. 107. 

 Hdix placenlula Shuttleworth, (Zonites) Bern. Jlit. 1852, 194. 

 Gould, iu Terr. Moll. iii. 19. 



My opinion regarding the identity of placentula is 

 founded on the description alone, not having seen any 

 authentic specimen. 



HELIX VORTEX Pfeiffer... .vol. ii. p. 240, pi. xxix. a, fig. 2, vol. iii. p. 34. 



Helix vortex Pfeiffer, Ar. f. Nat. 1839, ii. 351; Mon. Hel. Viv. i. 95; iii. 88. 



Chemnitz, ed. 2, ii. 110, pi. Ixxxviii. figs. 7-9. 



Reeve, Con. Icon. No. 644, (1852). 



Gould, vol. iii. 1. c. 

 Helix selenina Reeve, 1. c. 716, (1852). 



r 



I have seen no specimens from America of the larger 

 variety of the species found in the West Indies. 



