1863.] DR. L. PFEIFFER ON NEW LAND-SHELLS. 523 



19. SUCCINEA ARBOREA, Ad. & Ang., n. s. 



S. testa oblongo-ovata, spira quam apertura breviore, apice pa- 

 pilloso, alba, aureo-cornea, pellucida ; anfractibus 3, valde 

 convexis, lonffitudinalifer sti'iffosis ; apertura oblongo-ovata, 

 labio callo tenui instructo ; labro arcuate, simplici. 

 Long. 4 lin., lat. 2 lin. 



Hab. Burnside ; hills near Adelaide ; beneath bark of gum-trees 

 (Coll. Aiiffas.). 



The habits of this species differ from those of S. strigata, Pfr., 

 which are strictly terrestrial, the animals making their appearance 

 after rain, and spreading over the hills in considerable numbers. 

 Our species, on the contrary, shelters itself beneath the loose bark 

 of the Eucalypti. 



20. Blanfordia striatula, Menke. 



This species of Blanfordia is the only example of an operculate 

 laud-shell that I have met with in South Australia. The same spe- 

 cies is found in Tasmania. 



From the hills near Adelaide. 



4. Descriptions of Fifteen New Species of Land-Shells, 

 FROM THE Collection of II. Cuming, Esq. By Dr. 

 Louis Pfeiffer. 



1. Helix labuanensts, Pfr. T. imperforata, conoideo-depressa, 

 tenuis, carinata, striatula et liris mi/tut is elevatis prope suturam 

 distiitctioribus cincta, cornea; spira concaviusculo-conoidea, apice 

 acutiusada; sutura marginata ; anfr. 7, subplani, lente accre- 

 scentes, tdtimus non descendens, aciUissime carinatus, basi paruni 

 convex us ; apertura obligua, depresse securiformis ; perist. sim- 

 plex, rectum, margine supero brevi, antrorsum arcuato, basali a 

 carina recedente, leviter arcuato, ad insertionem subcalloso. 



Diam. maj. IG-i, min. 15, alt. 6 mill. 

 Hab. In insula Labuan (Mr. Hugh Low). 



2. Helix hugonis, Pfr. (182 «). T. sinistrorsa, clause per- 

 forata, turbinata, solida, undique conferte et subargute granulato- 

 striata, supcrne fuscula ; spira conoidea, vertice obtusulo ; anfr. 8, 

 lente accrescentes, convexiusculi, supra suturam fuvescentes, ulti- 

 mus compresse carinatus, infra carinam injtatus, castaneus ; aper- 

 tura obliqua, irregulariter angulato-lunaris, intus margaritacea ; 

 perist. subsimplex, margine supero brevi, basali perarcuato, versus 

 perforationem submcrassato et leviter dilalato. 



Diam. maj. 38, min. 35, alt. 21-22 mill. 

 Hab. In insula Labuan (iV/r. H. Low). 



3. Helix ceroconus, Pfr. (194 «). T. subperforata, conica, 

 tenuiuscida, striatula, cerea ; spira convexiusculo-conica , vertice 

 obtusulo ; sutura filomarginata ; anfr. 6-&^, convexiusculi, lente 



