32 



Genus Partula. 



Partula hyalina. Part, testa oblongd, IiT/alind, atifractibus 

 sex, longitud'maliter (evissime striatis et transversim minutissime 

 creherrimeque i'meatis ; labro albo : long. -^^, lat. -^ poll. 



Hab. in Polynesia. (Oheataroa.) 



The sculpture of this elegant species is most minutely delicate. 

 — W. J. B. 



Genus Achatina. 



AcHATiNA Dactylus. Ach. testdfiisiformi, siibpellucichujlave- 

 scente, strigis rubro-castaneis longitiidinalibus raris ; aiifractibus 

 septem, striis longitudinalibiis minutissime cremilatis crebris, et 

 suturam versus crenulatam lineis circiter sex trunsversis : long. 

 2-iV. lat. -rV poll. 

 Hab. in Insula Tumaco. 



The body whorl is large and long, and the upper whorls decrease 

 rapidly. The sculpture, especially when viewed through a micro- 

 scope, is most elaborate. — W. J. B. 



Genus Cyclostoma. 



Cyclostoma Cumingii. Cycl. testa orbicularis subdepressa, 

 albicante, epidermide fused ; spird elevatiuscula, carnea ; an- 

 fractibus quinque vel sex, rotmidatis, spiraHter sulcatis ; sutura 

 subdecurrente ; aperturd fere circulari, obJiqnd, alba, superne 

 subacuminata, peritremate simplici subincrassato ; umbilico max- 

 ima ; opercido corneO) tenui, spirali, avfractibus plurimis, mar- 

 gine fimbriato : long, l-^^, /at. 2 poll. 

 Hab. in America Meridionali. (Island of Tumaco.) 

 The epidermis appears to be very deciduous, and is much thinner 

 on the lower parts of the shell than on the upper, its remains form- 

 ing a broad, dark, fuscous band just below the suture. — 'G. B. S. 



Cyclostoma succineum. Ci/cl. testa parvd, orbiculato-pyrami- 

 dali, Icevi, succined ; anfractibus quinque, rotundatis ; sutura 

 distinct d ; aperturd rotundatd, margine basali interna angulatd ; 

 peritremate tenui, acuto ; umbilico parvo, margine carinato : 

 long. -fTs, lat. -i-Tj poll. 



Hab. in Polynesia. (Opara.)— G. B. S. 



Cyclostoma minutissimum. Cycl. testa globoso-pyramidali, 

 fulvd, apice jiigro ; aifractibus tribus rotundatis; sidurd pro- 

 fundd ; aperturd circulari; peritremate acuto ; umbilico nulla; 

 operculo cornea. 



Hab. in Insula Pitcairni. 



This is the smallest species of the genus. 



Genus Fasciolaria. 



Fasciolaria granosa. Fasc. testa fusiformi, tuberculifera, luteo- 

 albidd, transversim striata ; anfractibus suturam versus subangu- 

 latis, diiobus ultimis prcccipue tuber culiferis, luberculis niagnis, 

 dislantibus ; columelld luted triplicatd ; aj)ertMrd transversim 



