HELIX. 79 



HELIX TEXASIANA Moricand vol. ii. p. 191, pi. xlv. fig. 1. 



Hdix Ttxasiana Pfeiffer, Mon. Hel. Viv. i. 418; iii. 267, excl. syn. and var. /?. 



Chemnitz, ed. 2, (1846,) i. p. 85, excl. var. and figure. 



Deshayes in Lam. ed. 3, iii. 316. 



Reeve, Con. Icon. No. 707. 



Deshayes in Fer. i. p. 74, pi. 1. c. (excl. synon.) 

 Helix triodonta Ferussac, Mus. Par. 

 HtUx Tamaidipasensis Lea, Proc. A. N. S. Pliila. 1857, p. 102. 



Deshayes, also, in Ferussac's great work, confounds fati- 

 giata with this. In Chemnitz, ed. 2, Pfeiffer makes the 

 same errors of synonymy as in his Monograph. The fig- 

 ure is not this species, nor is it easy to determine what 

 it is. 



Shuttle worth, in his Diagnosen, has also pointed out 

 PfeifFer's error in ^X^cing fatigiata and plicata in the synon- 

 ymy of this species. 



From notes received from Pfeifier, and also from memo- 

 randa taken by my father at the Garden of Plants, it 

 appears that triodonta is identical with this species. On 

 vol. i. p. 162, a different opinion is expressed on triodonta. 



The variety of this species figured on pi. 78, fig. 18, was 

 at first considered a distinct species by me. Having sent 

 specimens to Pfeiffer, he writes that they are merely va- 

 rieties. It is distinguished by a wider umbilicus, and a 

 somewhat different arrangement of teeth. 



There can be no doubt of the identity of H. Tamauli- 

 pasensis with H. Texasiana. I have based my opinion on 

 a careful examination of Mr. Lea's shell. His description 

 is as foUows : 



T. superne paulisper elevata, subplanulata, inferne subinflata, niti- 

 da, longitudinaliter et subtiliter striata, minute perforata, anfr. 5 ; aper- 

 tura lunata, tridentata ; labro spissato, reflexo. Texas. 



Pfeiffer describes a var. /3, a larger form with 6 whorls, 

 horn-colored, and having a reddish band revolving above 

 the periphery. I have received it from Dr. Moore of 

 Texas. 



