190 Mr. W. H. Benson on new species of Cyclostoma. 



12. C. aratum, nobis, n. s. 



Testa aperte umbilicata, orbiculato-depressa, ferrugineo-albida, uni- 

 colori, vel ferrugineo-marmorata et fasciata, spiraliter sulcata, sulcis 

 radiato-striatis ; spira elevatiuscula, apice acutiuscula ; anfractibus 

 4^- convexis, ultimo cylindraceo, antice descendente, dilatato ; aper- 

 tura ovato-circulari, valde obliqua, margine parietali angulato, cal- 

 loso, superiori expanso, arcuato, obsolete crenulato, inferiori bre- 

 viter reflexo ; umbilico infundibuliformi omues anfractus exhibente. 



Operculo calcareo multispirato, intus membrana induto, concavius- 

 culo, extus carina elevata spirali subborizontali munito. 



Diam. major 18, minor 15, axis 9^ mill. 



Hub. in Indise Orientalis Provincia '• Northern Circars." Teste 

 Jerdon. 



Nearly allied to subdiscoideum, Sow., and modesfum, Petit de 

 la Saussayc, Journ. de Conchyl. 1850. It belongs to Apero- 

 storna, Troschel, as well as the more conical semisti'iatum, Sow., 

 which is a denizen of the opposite or western side of the Indian 

 Peninsula. 



In one specimen there is a broad inteiTupted band above, and 

 a narrow darker band below the periphery. 



13. C. ravidum, nobis, n. s. 



Testa aperte umbilicata, subdiscoidea, nitidiuscula, confertim scabre 

 tenuiter radiato-striata, olivaceo-lutea, sub epidermide alba ; spira 

 vix elevata, apice planato, obtuso, sutura impressa ; anfractibus 4 

 convexiusculis, lente accrescentibus, ultimo cylindraceo, antice vix 

 descendente, superne prope suturam sub lente obsolete spiraliter 

 striato ; apertura obliqua, circulari, peristomate tenui, recto, mar- 

 ginibus callo tenui junctis ; umbilico lato, perspectivo ; operculo 

 tenui, comeo, nmltisj)irato, extus concaviusculo. 



Diam. major 1.5, minor 13, axis 7 mill. 



Hab. ad apice? montium Nilgberries Indise Meridionalis. Teste 

 Jerdon. 



The peristome is not quite perfect in the only specimen re- 

 ceived by me from Dr. Jerdon, and some modification of its cha- 

 racters may be eventually necessary. The species differs from 

 C. annulatum, Troschel, which has a similar operculum, in the 

 more closely wound whorls, in the narrower umbilicus, more 

 delicate sculpture, and absence of any pattern on the upper side. 



14. C. Phanotopicum^, nobis, n.s. 



Testa subaperte umbilicata, depressa, subdiscoidea, tenui, non nitente, 

 striis scabris, acutis, radiatis, elevatis, aliis impressis spiralibus, 

 sub lente vix percipiendis, prope suturam decussatis, rufo-fusca, 

 strigis angulatis, interruptis picta ; spira depressa, apice prominula, 



* The name "Darjiling" Hellenized, 



