OTOSTOMUS. 149 



magnificus, Gratel. tamiolus, Nyst. 



mahogani, Sow. Taunaisii, Ferns. 



Largillierti, Phil. Thompsoni, Pfeiff. 

 loxostomus, Pfeiff. 



Sub-gen. auris, Spix (Pachyotus, P>eck, Chilonopsis, Fisch.). 



Shell perforate, ovate; apex acute, the upper whorls often 

 plicate at the sutures; aperture auriform; columella tortuous; 

 peristome widely expanded, retlexed. 



Illheocola, Moric. Swainsoni, Pfeiff. 



Maximiliana, Ferus. vulpina, Chem. 



melauostoma, Swains. 



Genus OTOSTOMUS, Beck. 



Shell rimately perforate, ovately pyramidal or obliquely 

 conical, last whorl keeled or angulated at the base ; aperture 

 more or less vertical ; columella plicate : peristome simple, 

 widely expanded, reflexed. 



Syn. Stenostoma, Spix, not Latr. Navicula, Spix, not 

 Bory or Quoy. 



E.v. 0. hygrohylseus, D'Orviyuy, pi. 74, fig. 0. Shell, 

 0. auris-leporis, Bruguiere, fig. G, a. 



The species of this extensive group are South-American, 

 inhabiting the forests of Bolivia, New Granada, Brazil, 

 Bahia, and Venezuela; the species of Aspastus are from 

 Solomon's Island. 



Species of Otostomus. 



auris-leporis, Brug. flexilabris, Pfeiff. 



auris-muris, Moric. lateralis, Mice. 



bivittatus, Sow. navicula, Wagn. 



coarctatus, Pfeiff. obliquus, Reeve. 



VOL. II. X 



