250 



callo nitido junctis. — Operculum membranaceum, planum, cereum, 



arctispirum. 

 Diam. maj. 20, min. ]6, alt. 10 mill. 

 Hab. Madagascar. 



35. Cyclostoma rtjsticum, Pfr. C. testa late umbilicatd, de- 

 pressd, subdiscoideu, solidd, spiraliter conferthn liratd, non nitente, 

 sordide albidd, pallide fusculo irregulariter variegatd ; spirdparum 

 elevatd, vertice submucronato ; anfractibus 4|-, convexiusculis, a(i 

 suturam subdepressis, ultimo terete, antice descendente ; aperturd 

 diagonali, subcirculari, intus earned; peristomate simplice, breviter 

 expanse, marginibus callo brevi junctis, supero repando. — Oper- 

 culum 1 



Long. maj. \7\, min. 13|^, alt. 7^ mill. 

 Hab. ? 



36. Cyclostoma psilomitum, Pfr. C testd mediocriter umbili- 

 catd, depresso-conoided, soliduld, virenti- luted, vix nitiduld, lineis 

 spiralibus subtilissimis, piloso-elevatis crebris obscurioribus cinctd; 

 spird breviter conoided, obtusd ; suturd subcanaliculatd ; anfrac- 

 tibus 4, convexis, ultimo terete , non descendente ; aperturd fere 

 verticali, subcirculari, intus albidd; peristomate simplice, acuto, 

 marginibus fere contiguis, callo brevi Junctis. — Operculum} 



Diam. maj. l.i, min. 11, alt. 8 mill. 

 Hab. Venezuela. 



37. Cyclostoma alatum, Pfr. C. testd late umbilicatd, conoideo- 

 depressd, soliduld, oblique confertim et incequaliter costulatd, vix 

 diaphand, albidd, fasciis angustis pallidissime corneis variegatd ; 

 spird brevissime conoided, acutiusculd ; suturd simplice ; anfrac- 

 tibus 4, modice convexis, ultimo subterete, aniice vix descendente, 

 lilaceo-nebuloso ; aperturd diagonali, subcirculari, intus lilaceo- 

 fusculd ; peristomate subduplice, latere dextro et basali connate, 

 expanse, externo superne alatim dilatato, latere sinistro subrejlexo. 

 — Operculum ? 



Diam. maj. 16, min. 13, alt. 8 mill. 

 Hab. S. Yago de Cuba. 



38. Cyclostoma scalare, Pfr. C. testd anguste umbilicatd, co- 

 noided, soliduld, oblique striatuld, nitiduld, corneo-luted ; spird 

 elatd, scalari, apice acutd ; suturd profunda ,- anfractibus 4^, per- 

 convexis, ultimo terete, antice subsoluto ; aperturd obliqud, cir- 

 culari, intus margaritaced ; peristomate simplice, continue, undique 

 vix expansiusculo. — Operculum ? 



Diam. maj. 9, min. 7, alt. 6^ mill. 

 Hab. in insulis Philippinis. 



39. Cyclostoma (Cyclophorus) lutescens, Pfr. C testd 

 umbilicatd, depresso-conoided, solidd, oblique filoso-striatd, sericed, 

 fusco-lutescente ; spird. breviter conoided, apice acutiusculd; suturd 

 profunda, simplice; anfractibus A\, convexis, rapide accrescentibus. 



