524 DR. L. PFEIFFER ON NEW LAND-SHELLS. [DcC. 8, 



accrescentes, ultimus convexior, non descendens, peripheria sub- 

 acute carinatus ; apertura vix obliqua, angulato-lunaris ; perist. 

 simplex, rectum, marginibus distantibus, supero brevi, basali leviter 

 arcuato, versus insertionem sensim dilatato, rejlexiusculo. 



Diam. maj. S\, min. 8, alt. 5^ mill. 



Hab. In insula Labuan {Mr. H. Low}. 



4. Helix jucunda, Pfr. (263 a). T. subclause perforata, co- 

 noideo-depressa, tenuis, sub lente conferte striata, nitida./usco- 

 cornea ; spira breviter conoideo-elevata, vertice subtili ; anfr. %\, 

 convexiusculi, lente accrescentes, ultimus non descendens, peripheria 

 rotundatus, basi medio impressus ; apertura vix obliqua, irregu- 

 lariter lunaris, intus submargaritacea ; perist. simplex, rectum, 

 marginibus distantibus, dextro regulariter arcuato, columellari 

 declivi, parum arcuato, ad insertionem breviter refiexo. 



Diam. maj. 17, min. 15^, alt. 9 mill. 

 Hab. In insula Labuan {Mr. H. Low). 



5. Helix dura, Pfr. (387 a), T. perforata, depressa, solida, 

 carinata, superne subconferte plicato-striata, nitidula, fusco- 

 isabellina ; spira brevissime conoidea, vertice minuto ohtusulo ; 

 sutura linearis, anguste marginata ; anfr. b\, vix convexiusculi, 

 lente accrescentes, ultimus non descendens, peripheria compresse et 

 acute carinatus, subtus modice convexvs, leviter radiato-striatus ; 

 apertura obliqua, depresss subrhombeo - lunaris ; perist. rectum, 

 margine supero tenui, basali a carina subito recedente, quasi ros- 

 tram formante , tum usque ad perforationem leviter incrassato. 



Diam. maj. 34, min. 30, alt. 11 mill. 

 Hab. Waigiou Island {Mr. Wallace). 



6. Helix nigrofasciata, Pfr. (165.5 a). T. anguste umbilical a, 

 globoso-trockiformis, soUdula, oblique regulariter striata, lineisque 

 impressis antrorsum descendentibus dense decussata, lutea, fasciis 

 2 latis nigris et interdum citmnmomea infra illas cincta; spira 

 turbinata, vertice acutiusculo ; anfr. 4, convexi, ultimus inflatus, 

 antice vix descendens, subtus spiraliter leviter striatus ; apertura 

 obliqua, rotundato-lunaris, intus alba, nigra fasciata ; perist. 

 album, marginibus convergentibus , dextro anguste expanso et re- 



flexiusculo, columellari late rejlexo, supra umbilicum fornicatim 



dilatato. 

 Diam. maj. 19, min. 17, alt. 13 mill, 

 Hab. Admiralty Islands. 



7. Helix latizona, Pfr. (1912 a!). T. mediocriter umbilicata, 

 depressa, tenuiuscula, striatula, vix nitidula, fusca, zona latiuscula 

 alba ad suturam notata; spira subplana; anfr. 4^, superi vix 

 convexiusculi, ultimus rotundatus, superne antice subsulcatus, de- 

 jlexus, subtus constrictus ; apertura obliqua. rotundato-ovalis ; 

 perist. undique sublate expansum, marginibus convergentibus, co- 

 lumellari tuberculo oblongo-nodiformi intus munito. 



Diam. maj. 26^, min. 21, alt. 11 mill. 

 Hab. In insula Ceram {Mr. Wallace), 



