Mr. W. H. Benson on new Hclicidsc. 389 



pressa, submarginata, a])ice obtiiso, hyalino ; anfractlbus 5 con- 

 vexiusculis, ultimo ad pcripbeiiani vakle rotundato ; apertuia 

 obliqua, subrotundato-kuiari, peristomate acute, recto, niargine 

 columellari brcviter expanso-reflexo. 



Diani. major 7, minor C, axis 4 mill. 



Habitat ad Phie Tbun, vallis Tenasserim. 



A small Nanina-like species^ with no very prominent cha- 

 racter besides the minute spiral sculpture. 



5. Helix Molecula, nobis; n. s. 



Testa anguste perforata, conoideo-globosa, tenui, obsolete radiato- 

 striata, nitida, fusco- vel castaneo-cornea ; spira conoidea, lateribus 

 convexiusculis, sutura imprcssa, submarginata, apice obtuso ; an- 

 fractlbus o~ arete convolutis, convexiusculis, ultimo ad peripheriam 

 rotundato, subtus convexo ; apertura vix obliqua, late lunari, pe- 

 ristomate recto, acuto, niargine columellari anguste rcflexo. 



Diam, major vix 5, minor -4, axis 3 mill. 



Habitat ad Rangoon, satis copiose. 



A minute shell with a more conoid spire and more closely 

 wound whorls than H. Causia. It is altogether deficient in the 

 spiral strise which distinguish that species. 



6. Helix forahilis, nobis, n. s. 



Testa subanguste et profunde umbilicata, conoideo-semlglobosa, 

 oblique striatula, cornea ; spira depresso-conoidea, apice elevati- 

 usculo, obtuso, sutura impressa ; anfractibus G convexiusculis, 

 ultimo non descendente, ad ambitum rotundato, circa umbilicum 

 vix perspectivum carinato, carina spirali, intrante; apertura leviter 

 obliqua, rotundato-lunata, peristomate recto ?, acuto ?, marginibus 

 callo tenui junctis, columellari breviter reflexo, cum basali angulum 

 fere rectum efformante. 



Diam. major 8, minor 7, axis 4 mill. 



Habitat ad Phie Thau. 



The single specimen obtained for examination is not in good 

 order, and the aperture is clearly defective. Notwithstanding 

 these disadvantages, the formation of the umbilicus, with its 

 carinated edge continued along the whorls within the cavity, and 

 the consequently angular base of the columella present such 

 peculiar features, that the form runs no risk of being confounded 

 with any other known species, and is certain of recognition when 

 it may again be met with. 



7. Helix Acerra, nobis, n. s. 



Testa perforata, orbieulato-depressa, tenui, obscure radiato-striatula, 

 pallide cornea, vix nitente ; spira planata, apice vix elcvatiusculo, 

 obtuso, sutura impressiuscula, tenui-marginata ; anfractibus 6^- 



