Binney on Terrestrial MoUusks. 23 



and already multiplying there, are very small indeed. At 

 the same time the shell before me bears strong resemblance 

 to the European group of this type. It seems to be be- 

 tween H. albanica Zicgler, and acies Partsch ; the carina 

 being less sharp than in the latter. Mr. Thomson suggests 

 that it may have been imported from the Sandwich Islands 

 on vegetables, but there is no species native to that region 

 which bears any resemblance to this. 



Since the publication of this species in the Proceedings 

 of the Academy of Natural Sciences, my doubts of its 

 being a native of California have been materially lessened 

 by the discovery of the allied species, Helix Newbenyana, 

 from the same Zoological region. The resemblance of 

 H. cultellata to the group of Eastern Europe is quite re- 

 markable, yet our knowledge of the Mollusks of the 

 Pacific Co.ist is still too imperfect to allow us to consider 

 this as a unique example of resemblance between species 

 of the two regions. 



HELIX STRIGOSA Gould vol. ii. p. 210, pi. xxvi. 



Hdix strigosa Gould, U. S. Ex. Ex. p. 36, fig. 41. 



Pfeiffer, 1. c. iii. 112; Malac. Blatt. 1857, 32. 



" Rocky Mountains in New Mexico." (Pfeiffer). 



Spurious Species. 



Helix Sagraiana Orbigny, a Cuban species, is erroneously attrib- 

 uted to California (on the authority of Sovverby) by Pfeiffer 

 (Mon. i. 325) and Carpenter (Report, p. 214). 



Extra Limital Species. 



The following species have not yet been found within the terri- 

 tory of the United States, though they are known to exist in the 

 neighboring States of Mexico. 



Helix Acutedentata W. G. Binney. Plate Ixxvi. Figure 1, and 

 Helix Loisa W. G. Binney. Plate Ixxvi. Figure 2. (Notes 



