Mr. W. H. Benson on some new species of Helix. 405 



tenuiuscula, oblique plicato- striata, fuscescente-cornea, spira con- 

 vexa, apice planato ; anfractibus 4, convexis, ederiter accrescenti- 

 bus, ultimo inflate, primo obsolete an^ulato, tunc rotundato, antice 

 breviter descendente, subtus tumido ; apertura obliqua magna, 

 subovato-lunata, peristomate simplici, acuto, marginibus conniven- 

 tibus, externo et basali vix incrassatis, columellari breviter re- 

 flexiusculo. 



Diam. major 43, minor 35, alt. 23 mill. 



Eab. in Montibus " Nilgherries " Indise Australis. Teste Jerdon. 



In form it is more globose and inflated than the other sinistral 

 Helices y excepting H. cicatricosa, Miill., qucesita, Desh., and 

 Bajadera, Pfr. In figure it more nearly approaches H. qucesita, 

 Desh. (Fer. t. 10. B. fig. 10, 12), but differs in the narrow um- 

 bilicus, smaller number of whorls, with a greater size, as well as 

 in colour, texture, and less developed peristome. 



2. Helix ThyreuSy nobis, n. s. 



Testa profunde umbilicata, sinistrorsa depressa, orbiculata, supra 

 cerea cornea, oblique radiatim plicato-striata, striis spiralibus exi- 

 lissimis decussata, subtus convexa, polita, radiato-striata, fusces- 

 cente-cornea, infra carinam breviter saturatiore ; spira convexius- 

 cula, apice planato ; anfractibus 4|^, convexiusculis, lente accres- 

 centibus, ultimo obtuse carinato, non descendente ; apertura obli- 

 qua, lunata, intus livide purpurea, margine expansiusculo, re- 

 flexiusculo, columellari breviter recte descendente cum basali an- 

 gulum eff^ormante. 



Diam. major 34, minor 29, alt. 16 mill. 



Hab. in India Australi. Teste Jerdon. 



The umbilicus, although moderate, is peculiarly deep and 

 distinct, comparatively with other orbiculate depressed shells of 

 the group, showing, like H. quasita, all the whorls internally to 

 the apex. 



3. Helix bidenticulata, nobis, n. s. 



Testa perforata, depresso-conica, obsolete radiato-striata, albida (de- 

 corticata) spira subconica, apice obtuso, sutura impressa ; anfrac- 

 tibus 6, arete convolutis, convexis, omnibus superne lineis duabus 

 sequidistantibus elevatiusculis instructis, ultimo carinato, subtus 

 convexo ; apertura arete securiformi, verticali, peristomatis margine 

 superior! brevissimo, columellari oblique descendente, expanso, 

 superne reflexo, basali arcuato, dentibus duobus minutis distanti- 

 bus, submarginalibus, dextro prominentiore, munito ; perforatione 

 per via. 



Diam. major 3, minor 2f, axis 2^ mill. 



Hab. inmontium " Nilgherries " vallibus calidioribus. Teste Jerdon. 



This interesting little species, remarkable on account of its 

 narrow aperture and spiral ridges on the spire, is the only known 



