246 



ovali ; peristomate simplice, albo, continuo, margine dextro sub- 

 incrassato, anguste angulatim patente, columellari in laminam 

 sinuosam, perforationem occultantem, nee claudentem, dilatato. — 

 Operculum immersum, lestaceum, planum, cinereum, paucispirum. 



Long. 20, diam. 11 mill. 



Hab. ? 



19. Cyclostoma Shuttleworthi, Pfr. C. testa clause umbili- 

 catd, oblongd, truncatd, spiraliter confertim plicatd, lineis longi- 

 tudinalibus obsolete decussatd, sericed, pallidissime fulvidd, fasciis 

 valde interruptis castaneis ornatd; spird oblongd; anfractibus 

 superstomate 3, convexiusculis, ultimo basi rotundato ; aperturd 

 verticali, angulato-ovali ; peristomate duplice : interno brevi, ex- 

 pansiusculo, externa late patente, concentrice striato, radiatim 

 plicato et castaneo-radiato, ad columellam exciso, lamind alba 

 fornicatd umbilicum prorsus claude?ite. — Operculum terminate, 



cartilagineum, paucispirum, nucleo basali. 

 Long. 22, diam. 1 1^ mill. 

 Hub. in insula Cuba. 



20. Cyclostoma radula, Pfr. C. testd perforatd, ovato-oblongd, 

 truncatd, tenui, lineis elevatis spiralibus et costis acutis longitudi- 

 nalibus subtiliter asperato-decussatd, pallide corned, fasciis an- 

 gustis, rufis, interruptis ornatd, non nitente ; spird sursum atte- 

 nuatd, late truncatd; suturd profundd, subsimplice ; anfractibus 

 superstomate 4, convexis, ultimo angustiore, rotundato ; aperturd 

 verticali, circulari; peristomate duplice: interno continuo, vix 

 porrecto, externo dilatato, horizontaliter patente, concentrice 

 striato, ad anfractum penultimum subexciso, margine sinistro fim- 

 briato-inciso. — Operculum planum, e duabus laminis compositum, 

 externa subtestaced, anfractibus 3j, nucleo subcentrali. 



Long. 14, diam. 7 mill. 



Hab. Almendares prope Havana. 



21 . Cyclostoma ovatum, Pfr. C. testd obtecte perforatd, oblongo- 

 ovatd, truncatd, tenui, longitudinaliter confertim plicatuld, sericed, 

 fusco-corned, vel pallidissime corned, maculis rufis seriatim dispo- 



sitis ornatd ; spird ovato-conicd, truncatd; suturd levi, irregula- 

 riter tuberculato-crenatd ; anfractibus superstomate 5, convexius- 

 culis, ultimo paulo angustiore, basi obsolete spiraliter sulcato ; 

 aperturd verticali, rotundato-ovali ; peristomate fusculo, duplice: 

 interno breviter porrecto, externo undique dilatato, campanulato- 

 expanso, radiato-costato, superne angulatim refiexo, anfractui 

 penultimo longe adnata, perforationem claudente, margine sinistro 

 suhauriculato, libera. —Operculum 1 



Long. 17^, diam. 8 mill. 



Hab. in insula Cuba. 



22. Cyclostoma Grateloupi, Pfr. C. testd perforatd, oblongd, 

 pupiformi, truncatd, tenuiiisculd, spiraliter confertim sulcata et 

 costix longitudinalibus, confcrtis, ?wn interruptis sculptd, diaphand. 



