70 Zoological Society. 



25. Melania circumstriata, nobis. M. testa elongatd, tur- 

 ritd, solidd, fusco-viridi ; anfractibiis convexiusculis, infra su- 

 titram paululum constrictis ; superioribus st?-iis (J transversis 

 elevatis, plicisque 8 majoribus longitudinalibus ornatis ; idtimo 

 striis 13; aperturd ovali-oblongd, bast dilatatd, superius acute 

 angidatd, et ferb rimatd, intus albidd ; peritremate sinuate, 

 colmnelld callosd. 



Long. 2j^ ; lat. ^ uuc. 



26. Melania subsuturalis, nobis. M. testd turritd, fusco- 

 viridi, lineis castaneis longitudinalibus obliquis variegatd ; an- 

 fractibus fere planis, quorum superiores striis elevatis perpau- 



cis validis, inferiores pluribus minoribus incequalibus ornati ; 

 ultimo ad basim crebristriato ; suturd distinctd, excavatd ; 

 aperturd ovali, superne angidatd, intus albido-ccerulescenfe ; 

 peritremate acuto, sinuato, extus effuso. 

 Long, ly^; lat. y^o unc. 



27. Paludina Hamiltoni, nobis. P. testd ovato-conicd, tenui, 

 perforata, viridi, concolore ; striis transversis undulatis, aliis- 

 que longitudinalibus tenuissime decussatd ; anfractibus 5 rotun- 

 datis, superioribus cetate erosis ; suturd impressd ; aperturd 

 ovali, supra angulatd, intus cesrideseente, margine paululum 

 incrassato, albido ; peristomate acuto, lined temd nigrd cir- 

 cumdato. 



Long. ^0 ; lat. j6_ uuc. 



The Bornean specimens being scarcely adult, the description is 

 drawn up from indi^dduals in my cabinet, which have long been there 

 Avithout any locality assigned. — W. M. 



28. Littorina scabra. Helix sc, Linn. 



29. Littorina melanostoma, Gray, Zool. of Beechey's Voy, 



30. Littorina albicans, nobis. L. testd ovato-oblongd, acn- 

 minatd, tenui, albidd, apice leevi, nitente ; anfractibus 7 vel 8, 

 quorum 5 ultimi striis numerosis paidatim crescentibus ornati ; 

 ultimus rotundatus, estate varicosus, strid unicd majore, quasi 

 carinatus, striis ad basim minoribus circumdatus ; aperturd 

 rotundato-lunari, lacted ; peristomate subreflexo. 



I'ong: To ; lat. fV ™c. 



A delicate species, of a milk-white hue, the older specimens having 

 many varices produced by the previous reflexions of the outer lip. 



31. Cerithium obtusum, Lam.; Zool. of the Samarang, Moll, 

 pi. 13. fig. 3. 



32. Cerithium unicarinatum, nobis. C. testd turritd, tenui, 

 apice truncato, hinc hide varicosd, cinered, longitiidinaliter pli- 

 catd, interstitiis longitudinaliter striato-rugosis ; suturd parum 

 impressd; anfractibus vix rotundatis, regulariter crescentibus ; 

 idtimo acute carinato, infra carinam crebristriato ; aperturd 

 mediocri subfuscd ; columella rectd ; peritremate modici re- 



flexo, albescente. 

 Long. 1^ ; lat. -f^ unc. 



