Binney un Terrestrial MoUusks. 79 



IIETilX TEXASIANA Moricand vol. ii. p. 101, pi. xlv. fi-. 1. 



//(/(> Texasiann 1'kkii-fk.i:, Man. Hel. Viv. i. 41^; iii. 2C7, excl. syn. ami viir. f3. 



Chkjinitz, ed. 2, (181G,) i. p. 85, l-xcI. var. and figure. 



Deshayes in Lani. cd. 3, iii. 316. 



Reeve, Con. Icon. No. 707. 



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

 Helix triodonta Ferussac, ]\Ins. Par. 

 Ihlix Tamaulipasensis Lea, I'roc. A. N. S. Phila. 1857, p. 102. 



Deshayes, also, in Ferussac's great work, confounds /«^i- 

 g-iata 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 placing /a^/o^mto and plicata in the synon- 

 ymy of this species. 



From notes received from Pfeift'er, 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 follows : 



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

 da, longitudinaliter et subtiliter striata, minute perforata, aufr. 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. 



