1863.] DR. L. PFEIFFER ON NEW LAND-SHELLS. 527 



nitidula, pallide fusca ; spira regulariter conoidea, vertice minuto 

 obtusulo ; sutura marginata, carina subprominula ; anfr. 6, vix 

 convexiuscuU, lente accrescentes, ultimus non descendens, acute 

 carinatus, basi convexus, substriatus, nitidior, medio pallidior, 

 impressus ; aperturafere diagonalis, angulato-lunaris, intus mar- 

 garitacea ; perist. rectum, mdrgine supero simplici, basali regu- 

 lariter arcttato, versus perforationem subincrassato, earn lamina 

 triangulari claudente. 

 Diam. maj. 30, miu. 26|, alt. 14 mill. ^ 



Hab. Louisiade Group, New Gaiedonia. t?vA.v>^^a. 



2. Helix lincolniensis, Pfr. (564 a). T. umbilicata, subco- 

 noideo-depressa, tenuis, superne conferte rugoso-striata et subtilis- 

 sime granulatu, pellucida, unicolor castanea ; spira subconoideo- 

 elevata, vertice obtusulo; anfr. 5, convexiuscuU, ultimus subde- 

 presso-rotu7idatus, antice non descendens, subtus circa umbilicum 

 angustum leviter radiato-striatus ; apertura obliqua, rotundato- 

 lunaris ; perist. simplex, rectum, marginlbus convergentibus, co- 

 lumellari superne in laminam rejlexamfuscam dilatato. 



Diam. maj. 22, min. 19, alt. 12 mill. 

 Hab. Port Lincoln. 



3. Helix murrayana, Pfr. (654 a). T. umbilicata, depressa, 

 tenuiuscula, confertissime filoso-plicata, vix nitidula, fusca ; spira 

 plana ; anfr. 5, convexiuscuU, regulariter accrescentes, ultimus 

 rotundatus, non descendens; umbilicus \ diametri subaquans ; 

 apertura parum obliqua, rotundato-lunaris ; perist. simplex, rec- 

 tum, marginibus conniventibus, columellari juxta umbilicum vix 

 dilatato. 



Diam. maj. 7, min. 6, alt. 3 mill. 

 Hab. Murray Cliffs, South Australia. 



4. Helix cassand'ra, Pfr. (1080 6). T. mediocriter umbilicata, 

 globoso-depressa, t&uuis, striatula et minutissime granvlata, parum 

 nitens, superne pallide isabellina, fasciis nonnulUs saturatioribus 

 obsolete notata, subtus albida ; spira breviter conoideo-elevata, 

 vertice minuto ; anfr. 5, regulariter accrescentes, superi vix con- 

 vexiuscuU, ultimus inflatus, antice vix deflexus ; apertura parum 

 obliqua, rotundato-lunaris, intus submargaritacea ; perist. simplex, 

 tenue, margine dextro recto, basali reflexiusculo, juxta umbilicum 

 in laminam triangularem fornicatam dilatato. 



Diam. maj. 26, min. 22, alt. 15 mill. 

 Hab. Murray Cliffs, South Australia. 



5. Helix zenobia, Pfr. (1131a). T. sublate umbilicata, conoi- 

 deo-lenticularis, solida, superne ruditer et conferte plicata, acute 

 carinata, rufa; spira breviter conoidea, apice obtusa ; sutura 

 submarginata ; anfr. 5j, convexiuscuU, lente accrescentes, ultimus 

 non descendens, supra carinam convexior, basi leviter radiato- 

 striatus, sensim in umbilicum transiens ; apertura perobliqua, 



