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



pressa, submarginata, apice obtuso, hyalino ; anfractibus 5 con- 

 vexiusculis, ultimo ad peripheriam valde rotundato ; apertura 

 obliqua, subrotuiidato-lunari, peristomate acuto, recto, margine 

 columellari breviter expanso-reflexo. 



Diam. major 7, minor 6, axis 4 mill. 



Habitat ad Phie Than, 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 impressa, submarginata, apice obtuso; an- 

 fractibus 5i arete convolutis, convexiusculis, ultimo ad peripheriam 

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

 ristomate recto, acuto, margine columellari anguste reflexo. 



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 striae which distinguish that species. 



6. Helix forahilisj nobis, n. s. 



Testa subanguste et profunde umbilicata, conoideo-semiglobosa, 

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

 usculo, obtuso, sutura impressa ; anfractibus 6 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 eiformante. 



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



Habitat ad Phie Than. 



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 Acerraj nobis, n. s. 



Testa perforata, orbiculatO'depressa, tenui, obscure radiato-striatula, 

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

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



