108 



j. Helix dkcidua, Pfr. T. umbilicata, depresso-turbtnata, 

 tennis, cost u I is membranaceis, dcciduis sculpt a, comeo-luiescens, 

 rufulo o/jso/t'/e et angulatim strigata ; spira subregulariter 

 conoidea ; anfr. 5 convexiusculi, lente accrescentes, u/timus non 

 descendens, peripherics subangulatus ; umbilicus angustus, per- 

 rii's ; apertura ubtitpia, lunato-rotundata ; perist. simplex, 

 rectum, murginibus convergent 'ibus, columellari vixpatulo. 



Diam. maj. 3^, min. 3 }, alt. 2 mill. 



Hub. New Zealand. 



6. Helix venulata, Pfr. T. imperforata, depressa, tenuis, 

 confertim plicato-striata, sericina, corneo et rufulo strigatim ct 

 maculatim variegata ; spira vix elevata ; anfr. 4^ convexi, sen- 

 sim accrescentcs, idtimus non descendens, basi medio impressus ; 

 apertura verticalis, elongato-lunaris ; perist. simplex, margine 

 dextro recto, basali refiexiusculo, columellari declici, subcalloso, 

 adnato. 



Diam. maj. 6, min. 5, alt. 3 mill. 

 II ab. New Zealand. 



7. Helix sciadium, Pfr. T. umbilicata, conoideo-semiglobosa, 

 solidula, subarcuato-striata, fulva, rufulo obsolete variegata ; 

 spira convexo-conoidea, apice acutiuscula ; sutura marginata ; 

 anfr. 5^- vix convexiusculi, idtimus non descendens, periplwria 

 acute carinatus, basi pauto convexior ; umbilicus \ diametri 

 fere cequans ; apertura vix obliqua, ang-ulato-lunuris ; perist. 

 simplex, rectum, margine columellari vix jxitulo. 



Diam. maj. 5^, min. 5, alt. 3 mill. 

 Hab. New Zealand. 



8. Helix niphas, Pfr. T. imperforata, globoso-conica, solida, 

 plicato-striata, alba ; sjrira convexo-conica, apice obtusa ; anfr. 

 5-j convexiusculi, lente accrescentes, idtimus non descendens, 

 basi parum convexus ; apertura obliipia, lunar is ; perist. rectum, 

 murginibus remotis, dextro brevi, simjilice, basali versus inser- 

 tionem sensim incrassato, tandem breviter ascendent e. 



Diam. maj. 11, min. 10, alt. 8 mill. 

 Hub. S. Miguel, Azores. 



9. Helix lutacea, Pfr. T. umbilicata, conoideo-depressu , so- 

 lida, striatula et striis confertissimis spiralibus decussatula, 

 parum nitens, fuscodutcscens ; spira \ conoid ea, obtusula ; anfr. 

 A\ convexiusculi, sensim accrescentes, ultimus subdej>resso-ro- 

 tundutus, obsoletissime angulatus, antice vix descendens ; um- 

 bilicus angustus, jjervius ; apertura diagonalis, rolundatu- 

 lunaris ; perist. crasse albo-labin/um, murginibus subconniven- 

 tibus, dextro expanso, basali reflexo, juxta umbilicum dilatato. 



Diam. maj. 23, min. lure 20, alt. 12 mill. 

 Hub. ? 



I<>. Helix exarata, Pfr, 7'. umbilicata, conoideo-depressu, 



