20 DR. L. PFEIFFER ON NEW LAND-SHELLS. [Jan. 8, 



G. Descriptions of Forty-seven New Species of Land- 

 shells, FROM the Collection of H. Cuming, Esa. By 

 Dr, L. Pfeiffer. 



(Plates II. & III.) 



1. Helix trochiscus, Pfr. T. imperforata, conica, soUdula, 



IcBvigata, nitidisshna, pellucida, cornea ; spira convexo-conica ; 



sutura submarginata : anfr. a\ convexiusculi, ultwius rotun- 



daius, non descendetis ; apertura subverticalis, lunaris ; perist. 



simplex, rectum, marginibiis remotis, columellari brevi, sub- 



stricto, calloso-subincrassato. 

 Diam. maj. .5, miii. 4^, alt. 4^ mill. 

 Eab. Siam (3f. Mouhot). 



2. Helix ignescens, Pfr. (PI. II. fig. 1). T. suhperforata, glo- 

 hoso-depressa, vitrinoidea, tenuis, striatula et striis impi'essis 

 spiralibus sub lente decussatida, ptelliicida, nitidissima, corneo- 

 ignescens ; spira parum elevata ; anfr. A\ rapide accrescentes, 

 convexiusculi, ultimus ventrosus,non descendens ; apertura fere 

 diagonalis, rotundato-lunaris ; perist. simplex, rectum, margi- 

 nibiis vix conniventibus, dextro antrorsum subarcuato, columel- 

 lari arcuato-declivi, filari, superne anguste refexo. 



Diam. maj. 27 \, min. 23, alt. 15 mill. 



Hab. Isle of Batchian, Moluccas (3fr. Wallace). 



3. Helix subcornea, Pfr. T. subclause perforata, depressa, 

 tenuis, laevigata, albido-cornea ; spira vix conoideo-elevata, ver- 

 tice subtili ; sutura filo marginata ; anfr. 7^ convexiusculi, 

 ultimus vix latior, basi convexior ; apertura verticalis, auri- 

 formi-lunaris ; perist. simplex, rect%im, margine columellari 



longe declivi, subincrassato. 

 Diam. maj. 13f, min. 12^, alt. C mill. 

 Hab. Siam {M. Mouhot)". 



4. Helix c.«sia, (Nanina) Pfr. T. perforata, depressa, tenuis, 

 pellucida, corneo-grisea, superne striatula, 2:)arum nitens, sub 

 lente lineis spiralibus sculpta, subtus radiato-striata, nitidior ; 

 sj)ira breviter conoidea, vertice subtili; sutura levis ; anfr. 6 

 j)laniusculi, regulariter accrescentes, ultimus medio subcarina- 

 tus, basi convexiuseulus ; apertura obliqua, late lunaris ; perist. 

 simplex, rectum, marginibus remotis, columellari declivi, ad in- 

 sertionem vix dilatato. 



Diam. maj. 17, min. 15^, alt. 8 mill. 

 Hab. Admiralty Islands. 



5. Helix faradensis, Pfr. T. anguste umbilicata, depresso- 

 turbinata, solidula, superne arcuato-striata, lineisque spiralibus 

 sub lente conspicuis scuJpta, lutescenti-cornea ; spira conoidea, 

 vertice minuto ; anfr. 7) convexiuscidi, ultimiis latus, rotundatus, 

 suhtus radiato-striatus, nitidior; apertura obliqua, rotundato- 



