Mr..W. H.Benson on new Cingalese Land- Shells. 385 



mellari arcuato, ad basin oblique truucato, intus plica obliqua 



spiraliter ascendente. 



Long. 13; diam. 6 mill. ; apert. 5 mill, longa, 3 lata. 

 Habitat ad Ellcgamme Nalande, et aliunde in pago Matelle. 



The form is less attenuate than the Nilgherry species, Ach. 

 j B. ; the suture also is crenulate and more impressed. 



Cyclophorus Cadiscus, B. n. s. 



Testa sublate et profunde umbilicata, convexo-depressa, tenui, con- 

 fertim oblique striata, sub epidermide pallide corneo-albida ; spira 

 convexa apice obtuso, sutura profundiuscula ; anfractibus 5 con- 

 vexiusculis, ultimo cylindrico, antice descendente ; apertura obli- 

 qua, ovato-rotundata, superne angulata, peristomate duplici, in- 

 teriore continuo, modice porrecto, exteriore adnato, ad dextram 

 breviter expanso, margine columellari recto, simplici. 



Diam. major 17, minor 15, axis 8 mill. 



Habitat raro in pago Matelle orientali. 



Remarkable among the depressed species of Cyclophorus in- 

 habiting Ceylon for its deep umbilicus and convex spire. 



Cyclophorus Cytopoma, B. n. s. 



Testa late et profunde umbilicata, planato-depressa, subdiscoidea, 

 vix nitidula, confertim et arcuatim rugoso-striata, fulvo-castanea, 

 subtus pallidiore apicem versus flammis pallidioribus, et infra me- 

 dium anfractus ultimi fascia fusca inconspicua ornata ; spira pla- 

 nulata, apice non prominente, sutura profunda ; anfractibus 5| 

 convexis, ultimo antice sensim descendente ; umbilico diametri 

 sequante; apertura ampla, obliqua, angulato-ovali, intus lactea, 

 peristomate simplici expansiusculo, superne acute angulato, bre- 

 viter adnato, intus incrassato-labiato, margine columellari subtus 

 recedente, dextro, superne antice arcuato. Operculo fulvo-corneo, 

 solidiusculo, 7-spirato, convexiusculo, ad apicem foveato, intus 

 concavo, margine externo sulco lato fere circumdato, anfractibus 

 ad mar^inem carinatis, carina exteriore elevatiore. 



Diam. major 24|, minor 19, axis 8 mill. 



Habitat in Insula Ceylon. 



The keeled edges of the whorls of the somewhat thickened 

 operculum form a striking character in this species, and afford 

 indications of an approach to the operculum of Pterocyclos, 

 From C. Bairdi, Pfr., the flat spire, the formation of the aper- 

 ture, the colouring, absence of spiral striation, or angularity in 

 the periphery, &c., sufficiently distinguish the species, which has 

 some features in common with C. lozostoma, Pfr., of which also 

 the operculum remains unknown. In some respects it resem- 

 bles C. Cratera, B., which has, however, a double peristome and, 

 like other allied species, a very different operculum. 



Cheltenham, March 31, 1860. 

 Am. $ Mac/. N. Hist. Ser. 3. Vol. v. 26 



