1862.J DR. L. PFEIFPER ON NEW LAND SHELLS. 269 



distincfe angulatus, subtus convexus, lutescens, circa umbilicum 

 angusticm striis spiralibus subimdulatis sculptus ; apertura 

 obliqua, rotundato-hmaris, intus eoncolor, margaritacea; perist. 

 simplex, rectum, marginibus eonvergentibus, columellari ad m- 

 sertionem breviter fornicato-rejlexo. 



Diam. maj. 61, min. 49, alt. 30 mill. 



Hab. Lao Mountains, Camboja (Mouhot). 



4. Helix benigna, Pfr. (701 a). (PL XXXVI. figs. 11, 12.) 

 T. late wnhilicata, lenticularis, perteniiis, rugoso-striata et 

 striis spiralibus minutis confertissimis decussata, 'pellucida, 

 pnllide cinnamomea ; spira parum elevata, vertice subtili ; su- 

 tura marginata ; anfr. C, vix convexiusculi, lente accrescentes, 

 sutnmi liris nonnullis elevatis scidpti, idtimus acute earinatiis, 

 supra carinam leviter canaliculatus, basi convexior ; apertura 

 parum obliqua, suh'hombea ; pei'ist. simplex, rectum,, margine 

 cohimellari ad insertionem vix dilatato. 



Diam. maj. 32|, min. 29, alt. 1 1 mill. 

 Hab. Lao Mountains, Camboja {Mouhot). 



5. Helix lizardensis, Pfr. (729 a). T. umbilicafa, conoideo- 

 lenticularis, solida, carinata, covferte costulato-striata et lira 

 filiformijuxta carinam posita instruct a, cerea ; spira conoideo- 

 convexa ; sutura carinato-exserta ; anfr. 8, planiusculi, lentis- 

 sime accrescentes, ultimus basi convexiusculus, ruditer striatus ; 

 umbilicus mediocris, profundus, \ diametri vix cequans ; aper- 

 tura subverticalis, anguste angidato-lunaris ; perist. simplex, 

 rectum, margine basali leviter et regidariter arcuato. 



Diam. maj. 7i, min. 7|, alt. 3 mill. 



Hab. Lizard Islands {Macgillivruy). 



Nearly allied to the Ceylonese Helix clathratula, Pfr. {Puteolns 

 claihratulus, Bens.), but larger, more flattened ; the umbilicus much 

 smaller, the strise less elevated, the peripherical keel sharper, and the 

 second keel running closely approximate to it. 



6. Helix illustris, Pfr. (1313 b). (PI. XXXVI. %. 8.) T. 



imperforata, globoso-turbinata, solida, oblique et transverse 

 irregulariter malleato-rugosa, nitidida, castanea ; sjnra convexo- 

 turbinata, vertice obtuso ; anfr. 5, convexiuscidi, regidariter ac- 

 crescentes, idtimus utrinqice convexior, medio obtuse angxdatiis, 

 antice vix descendens ; columella subverticalis, brevis, foryiicato- 

 dilatata, lilaceo-carnea ; apertura obliqua, subtriangulari-luna- 

 ris, intus margaritacea ; perist. expansum et refexiuscidum, 

 lilaceo-carneum, marginibus callo nitido lilacino junctis. 

 Diam. maj. 62, min. 52, alt. 35 mill. 



/3. Fidvo-lutescens, fascia tma mediana castanea oi'nata, perist, 



cameo- albido. 

 Diam. maj. 63, rain. 51, alt. 37 mill. 

 Hub. Lao Mountains, Camboja (Mouhot). 



