Xew Species of Triodopsis. 



115 



V. — Description of a Neiv Species of Triodopsis, from Nerc 



Mexico. 



BY THOMAS BLAND. 



Read November 22d, 1880. 



Triodopsis Levettei, nov. sp. 



Testa umbilicata, orbiculato-convexa, tenuis, nitens, translucens, leviter 

 et irregulariter oblique striata, castanea, superne pallescens ; spira vix 

 elevata, apice obtusa ; sutura impressa ; anfr. 7 convexiusculi, lente accres- 

 centes, ultimus antice breviter depressus, spiraliter subobsolete striatus, 

 pone aperturam constrictus, subscrobiculatus, basi subconvexus ; umbilicus 

 mediocris (J- diametri), pervius ; apertura perobliqua, subcircularis, dente 

 albo, valido, flexuoso, transverso, in pariete aperturali intrante coarctata ; 

 peristoma reflexum, pallide castaneum, intus callosum, marginibus callo 

 tenuissimo junctis, margine dextro dente albo, obtuso, erecto, submar- 

 ginali, basali dentibus duobus, albis, transversis, supero majore, iustructo. 



Diam. maj. 16, min. 15, alt. 6 J ; apert., perist. incluso, long. 7, lat. 8 

 mill. 



Triodopsis Levettei, nat. size. 



Shell umbilicate, orbiculate-convex, thin, shining, translucent, slightly 

 and irregularly obliquely striated, chestnut colored, the upper whorls paler; 



