1862.] DR. L. PFEIFFER ON NEW LAND SHELLS. 271 



notata ; spira convexo-eonoidea, vertice acute mammillato ; 

 anfr.5^, convexiiisculi, ultimus peripheria obsolete subanc/ulatxis, 

 bast planiusculus, fuscus ; columella obliqua, compressa, basi 

 truncata; apertura perobliqua, subtrapezoidea ; perist. album., 

 margine supero expanso, ad dextram effuse, basalt reflexo, eo- 

 lumellari dilatato, supra rimam umbilicalem adnata. 

 Diam. maj. 28|, min. 22, alt. 22 mill. 

 Hab. Island of Mjsol (JFallace). 



11. Helix aurora, Pfr. (1675 a). T. umbilicata, tiirbinato- 

 depressa, solidula, irregulariter striatida, parum nitens, uni- 

 color fusca ; spira breviter conoidea, vertice minuto, acutius- 

 culo ; anfr. A\, convexiusculi, regidariter accrescentes, ultimus 

 peripheria carinatus, antice vix descendens, subtus parum con- 

 vexus ; apertura obliqua, lata, depresse lunaris, intiis roseo- 

 margaritacea ; perist. pallide roseum vel lilaceo-carneum, mar- 

 ginibus convergentibus, supero horizontaliter abeunte, expanso, 

 ad dextram subeffuso, basali vix arcuato, reflexo, columellari 

 lamina fornicata dilatata umbilicum angustum fere occultante. 



Diam. maj. 30, min. 24, alt. 1 7 mill. 

 Hab. Isle of Waigiou {Wallace). 



12. Helix deliciosa, Pfr. (1676 a). (PI. XXXVI. fig. 3.) 

 T. umbilicata, depresse turbinato-globosa, tenuiuscula, subdi- 

 stanter plicatulo-striata, parum nitens, isabellina, lineis rufis 

 eleganter circumdata ; spira conoidea, acutiuscula ; anfr. fere 

 6, convexiusculi, ultimus non descendens, supra medium filoso- 

 angulatus et fascia latiore rufa cinctus, basi convexus ; umbi- 

 licus angustus, pervius; apertura fere verticalis, rotundato- 

 lunaris ; perist. pallide roseum, expansum, marginibus vix con- 

 vergentibus, desotro medio subangulatim producto, columellari 

 dilatato, fornicato. 



Diam. maj. 26, min. 23, alt. 15| mill. 

 Hab. Lao Mountains, Camboja (Mouhot). 



13. Helix exacta, Pfr. (1879 b). T. umbilicata, depressa, 

 solida, subrugoso- striata, fulva ; sjnra plana, medio subim- 

 mersa ; anfr. 5^, vix convexiusculi, lente accrescentes, ultimus 

 antice descendens, peripheria rotundatus, basi circa umbilicum 

 angustum pervium subinflatus ; apertura parum obliqua, an- 

 guste lunaris ; perist. breviter expansum et incrassatum, mar- 

 ginibus remotis, dextro ab insei'tione breviter ascendente, colu- 

 mellari vix dilatato. 



Diam. maj. 30, min. 2^^, alt. 14 mill. 

 Hab. North of New Guinea (Wallace). 



14. Helix molliseta, Pfr. (1885 a). T. umbilicata, depressa, 

 planorboidea, tenuiuscula, alba, lineis rufis variis cincta et epi- 

 dermide fulva setis brevibus erectis mollibus dense obsita 

 vestita ; spira plana, medio immersa ; anfr. 5\, convexiusculi, 

 ultimus permagnus, depresso-rotundatus, antice deflexus, subtus 



