150 1 



spira brevis, obtusa; anfr. 4 planiiisculi , ultimus acute 

 carinatus, basi convexior, interdum striis elevatis spirali- 

 bus obsolete cinctus; apeitiira subobliqua, obtuse trian- 

 gularis; coliimella brevis, obsolete tuberculata; perist. 

 acutum, brevissime expaiisum ; callus basalis nitidus, linea 

 albida circumscriptus. — Operc. tenue, carneum. — Diam. 

 öVa, alt. SVa mill. 



Habitat in insulis nicobaricis (Th. Philippi). 



16. Helkina lirata Pfr. 



T. orbiculato-conoidea, tenuis, acute et confertim 

 concentrice lirata, diaphana, albida; spira conoidea, acuta; 

 anfr. 4V2 — 5 vix convexiusculi, ultimus carinatus, basi 

 medio impressus; apertura obliqua, rotundato-subtriangu- 

 laris; columella brevissima, simplex, in callum basalem 

 tenuissimum dilatata; perist. breviter expansum, margine 

 basali medio obsolete unidentato. — Dijun. 4, alt. 27$ mill. 



Habitat in Mexico, Yucatan (Hegewisch). 



16. Helicina Tilei Pfr. 



T. conica, solidula, laevigata, opaca, citrina; spira 

 regulariter conica; anfr. 5, summi planulati, ultimus con- 

 vexus, obsolete bicarinalus, basi subplanatus; apertura 

 perobliqua, semiovalis; columella brevis, basi subtuber- 

 culata, superne linea impressa transversa marginata; pe- 

 rist, subincrassatum, album, reflexiusculum , margine su- 

 pero sinuoso. — Operc? — Diam. 9, alt. 7 mill. 



Habitat in Brasilia (Tile). 



Nahe verwandt mit Hei. variabilis Wagn. , doch in 

 Gestalt und Grösse der H. columbiana Phil, ähnbcher. 



17. Cyclostoma annulatum Troschel. 



T. umbilicata, depressissima, subdiscoidea, solidula, 

 ruguloso- striata, sub epidermide tenui, olivaceo - cornea 

 alba, superne obsolete fusco-maculata; spira plana; anfr. 

 4V» — 5Vj convexiusculi; umbilicus latissimus, profundus; 



