140 ACHATININiE. 



Sub- gen. frickella, Pfeiffer. 



Shell sub-perforate, obloug ; apertural paries furnished with an 

 intrant, spiral lamella; columellar plait compressed; peritreme 

 simple, straight. 



amcena, Pfeiff. 



Genus TORNATELLINA, Beck. 



Shell imperforate, ovate or suh-trochiform; aperture semi- 

 lunar; columella tortuous, truncated; margins unequal, the 

 columellar uni-lamellated, the external plicated within. 



Syn. Elasmatina, Petit. 



Ex. T. hilamellata, Anton, pi. 74, fig. 4. 



The species of Tornatellina vary in their geographical 

 distribution, some being European, and others inhabiting 

 the Island of Opara in the Pacific Ocean, the Island of 

 Juan Fernandez, Lima, and Madeira. 



Species of Tornatellina. 



bilamellata, Anton. trochiformis, Beck. 



globosa, Petit. trochlearis, Beck. 



Recluziana, Petit. 



Sub-gen. leptinaria, Beck. 



Shell ovate, or elongated ; outer lip simple. 



Antillarum, SJiuttl. concentrica, Reeve. 



Antoni, Pfeiff. Cumingiana, Pfeiff. 



castanea, Pfeiff. lamellata, Pot. and Mich. 



Cernica, Bens. lamellosa, Moric. 



