dentatioa elegantly crossed with slight strise, the effect of which, as 

 well as the darker line, is partially visible throughout the sutures. 



7. Helix conicoides, nobis. H. testa iinperforatd, trochi- 

 formi, acute carinatd, tenui, pellucidd, luteo-corned ; spiraliter 

 leviter striatd, striis ad suturam majoi-ibus, confertioribus ; 

 apice mamillari ; anfractihus 7, super ioriLus suhconvexis, duo- 

 bus ultimis planulatis, ultimo subtus convexo, nitido, ad cari- 

 nam et in medio depresso ; aperturd trapeziformi, subtus arcu- 

 atd ; peristomate simplici, acuto, subtus Jtexuaso, marginibus 

 callo tenui junctis. 



Long. 3L ; lat. ^ ; alt. ^ unc. 



8. BuLiMus ciTRiNUS, Bruguiere ; Reeve, Conch. Icon. Bui. 

 pi. 31. fig. 187 «. 



9. BxJLiMus CHLORis, Reevc, Conch. Icon. Bui. pi. 37. fig. 223. 



10. Cyclostoma Borneensis, nobis. C. testa suborbiculari, 

 depresso-conoided, acuminata, albidd, fusco-variegatd, maculis 

 ad suturam, cinguloque infra medium fusco ornatd ; striis ob- 

 liquis minutis, aliisque circularibus minutissimis impressd; an- 

 fractihus quinque planiusculis, carinatis; ultimo magno, margine 

 acute carinato, circa umbilicum obtuse angulato ; apertur dsub- 

 circulari ; peritremate albo, reflexo ; supra productiore, subtus 

 reflexo, ad columellam subsinuato ; umbilico magno, profundo ; 

 operculo corneo, tenui. 



Long. 1^^; lat. Ij^; alt. ^ unc. 



Varietas minor, magnitudine solum diversa. 



Shell bearing some characters in common with both C. aquilum. 

 Sow., and C. acutimarginatum. Sow. ; but having a more depressed 

 spire, and flatter whorls than either of those species. 



11. Cyclostoma, apparently C.parvum, Sow. Thes. Conch. Cycl. 

 fig. 254, 255. 



12. Cyclostoma UNDATUM, nobis. C testa globoso-pyramidali, 

 tenui, pellucidd, alba, lineis hyalinis undatis decurrentibus or- 

 natd, tenuiter striatd; anfractibus 6, parum rotundatis, pri- 

 mis conicis regulariter crescentibus ; ultimo magno, obtuse cari- 

 nato ; aperturd circulari, superne angulatd ; peritremate lato, 

 expanso, vix nisi ad columellam reflexo; suturis mediocribus ; 

 umbilico parvo. 



Long. -^ ; lat. ^% ; alt. -^ unc. 



This species belongs to the division of the genus of which C. lave, ^ 

 Gray, may be considered the type. 



13. Cyclostoma tenuilabiatum, nobis. C. testa discoided, 

 spird depressd, plana, colore pallido, superne castaneo-macu- 

 latd et undulatd ; epidermide luteo-castaned, indutd; anfrac- 

 tibus 5 rotundatis, 4 primis Icevibus, ultimo lineis impressis 

 irregularibus ruguloso ; suturd impressd; aperturd circulari; 

 peritremate dvplici ; interna simplici, superne emarginato ; ex- 



