MONOGRAPH OF THE GENUS 

 POMATIAS, Studer. 



Plate CCLIX. 



Gen. Char. Molluscum terrestre, gasteropodum. 



Testa turrita, pyramidalis, concentrice liris elevatis striata ; au- 

 fractibus numerosis, duobus apicalibus papillaribus kevibus ; aper- 

 tuni rotundato-subtrigona; margine intus continuo, extus reflexo, 

 ad columellam augulato. 



Operculo corneo, paucispirali, bilarninato. 



Obs. These shells are turreted, pyramidal, striated, with the two 

 apicial whorls papillary and smooth. The aperture is slightly 

 trigonal, the inner edge continuous, the outer edge flattened out- 

 wards and angulated at the base of the columella. Operculum 

 horny, with few whorls, composed of two layers concamerated 

 within. The differences between the species consist chiefly in the 

 character of the striation. 



SPECIES. 



1. auritus (f. 1, 2), Zeigl. — T. tenuis, subventricosa, pallide 

 fulva; striis crebris, numerosis, alteris rarioribus crescentibus; labro 

 expanso, postice acuminato, ad columellam in auriculam dilatato. 

 Obs. The largest of the genus; having the body covered with nearly 

 equal strife, with a few sharp and prominent at intervals. The 

 peritreme is expanded into a decided auricle at the base of the 

 columella, and pointed at its junction with the upper whorl. 



2. tessellatus (f. 15, 16). — T. P. aurito similis sed brevior ; 

 striis crassiusculis, a;qualibus, ad suturam paululum exstantibus ; 

 pallida, maculis distantibus ad suturam quadratis, ad medium an- 

 fractum longitudinalibus bifasciata; apertura aurita, postice vix 

 acuminata. Obs. The outer lip is more rounded at the top and 

 the striee more regular and equal than in P. auritus. A row of 



VOL. III. 2 L 



