32 



Genus Partula, 

 Pautula hyalina. Part. testą oblongd, hyalind, mifractibui 

 sex, longitudinaliter levissime striatis et transversim minutissime 

 creherrimeque lineatis ; labro albo : long. -fi^, lat. tV poli, 

 Hab. in Polynesia. (Oheataroa.) 



The sculpture of this elegant species is most minutely delicate, 

 — W. J. B. 



Genus Achatina. 

 AcHATiNA Dactylus. Ach. testdfusiformi, subpellucida,Jlave' 

 scente, strigis rubro-castaneis longitudinalibus raris ; anfractibus 

 septem, striis longitudinalibus minutissime crenulatis aebris, et 

 suturam verstis crenulatam lineis circiter sex transversis : long. 

 2-rSo-. l^t. -i^B- poli. 

 Hab. in Insula Tumaco. 



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

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

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



Genus Cvclostoma. 

 Cyclostoma Cumingii. Cį/cL testą orbiculari, subdepressa, 

 albicante, epidermide Juscd ; spird elevatiuscula, carnea į an- 

 Jyactibus quinque vel sex, rotundatis, spiraliter sukati s ; sutura 

 subdecurrente ; aperturd Jere circulari, obUqud, alba, superne 

 subacuminata, peritremate simplici subincrassato ; umbilico mal- 

 imo ; operculo corneo, tenui, spirali, a}>fractibus plurimis, mar- 

 gine Jimbriato: long. 1-i-V) lat. 2 poli. 

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

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

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

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



CvcLOSTOMA succiNEUM. Ci/cl. testd parvd, orbiculato-pyrami- 

 dali, leevi, succined ; anfractibus quinque, rotundatis ; suturd 

 distinctd ; aperturd rotundatd, tnargine basali internd angulatd ; 

 peritremate tenui, acuto ; umbilico parvo, margine carinato : 

 long. -i^o, lat. -^^ poli. 



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



Cyclostoma minutissimum. Cycl. testd globoso-pt/ramidali, 

 Jidvd, apice nigro ; anjractibus tribus rotundatis; suturd pro- 

 Jundu ; aperturd circulari; peritre7nale acuto ; umbilico nulio; 

 operculo corneo. 



Hab. in Insula Pitcairni. 



This is the smallest species of the genus. 



Genus Fasciolaria. 



Fasciolaria granosa. Fase. testdfusiformi, tuberculijera, luteo- 

 albidii, transversim striatu ; anfractibus suturam vcrsus subangu- 

 latis, duobus ultimis prcecipue tuberculiferis, tuberculis magnis, 

 distantibus ; columelld luteu triplicatd ; aperturd transversim 



