184 Mr. W. H. Benson on new species of Helix. 



species of AUjcceus, Diplommatina, Pterocyclos, Cyclophorus, 

 Megalomastoma, Streptaulus, and Pupina, lately described by 

 me in the 'Annals/ have been figured in plates 35 and 37 of 

 Pfeiffer's ' Novitates Conchologicse.^ Others previously pub- 

 lished in the same work appear in Kiistei-^s Monograph of Cij- 

 clostoma, up to plate 50. 

 Cheltenham, January 8, 1859. 



XXI. — Descriptions of new species of Helix, Streptaxis, and 

 Vitrina, collected by Mr. W. Theobald, jun., in Bwmnh, the 

 Khasia Hills, and Hindustan. By W. H. Benson, Esq. 



1. Helix Ceryx, n. s. 



Testa perforata, turbinato-conica, teuui, nitidula, oblique striatula, 

 liris pluribus remotis, striisquc confertissimis interpositis spiralibus 

 sculpta, trauslucente, albida, fasciis duabus latis fuscis, superiori 

 prope suturam, altera infra peripheriam, ornata ; spira attenuato- 

 conica, apice obtusiusculo ; aufractibus 4 convexiusculis, ultimo 

 medio carinato ; apertura obliqua, rotundata, peristomate tenui, 

 acuto, margine columellari verticali anguste reflexo, perforationem 

 subtegente. 



Diam. major 6, minor 5, axis 5 mill. 



Habitat ad Phie Than, vallis Tenasserim, raro occurrens. Teste 

 W. Theobald. 



The single specimen sent for inspection is injured in the right 

 lip. There are five raised lines, at regular intervals, on the upper 

 side of the whorls, between the suture and the periphery; these 

 lines are more irregular in the last whorl. The translucent 

 brown bands contrast strongly with the white ground of the 

 shell. 



2. Helix Attegia, n. s. 



Testa anguste perforata, conica, tenui, striatula, liris tenuibus vix 

 elevatis, remotiusculis, spiralibus, striisque minutissimis interpositis 

 decussata, pelhicida, cornea ; spira subanguste conica, sutura levi- 

 ter impressa, apice acuto, pallido ; aufractibus 7 convexiusculis, 

 ultimo filoso-carinato, subtus couvexiusculo ; apertura vix obliqua, 

 rhombeo-lunari, peristomate acuto, recto, margine columellari ver- 

 ticali, superne valde dilatato-reflexo, perforationem subtegente. 



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



Habitat ad Phie Than, vallis Tenasserim, frequens. 



Distinguished from the Cingalese H. hyphasma, Pfr., by its 

 narrower conical form, sculpture, structure of columcllar lip, &c. 



3. Helix Arx, n. s. 



Testa anguste perforata, acute conica, tenui, striis minutissimis con- 

 fertissimis obliquis, hrisque 3-4 spiralibus, validis, superne sculpta. 



