246 
ovali ; peristomate simplice, albo, continuo, margine dextro sub- 
incrassato, angusté angulatim patente, columellari in laminam 
sinuosam, perforationem occultantem, nec claudentem, dilatuto.— 
Operculum immersum, testaceum, planum, cinereum, paucispirum. 
Long. 20, diam. 11 mill. 
Hab. 2 
19. Cyctostoma SHutTTLEWoRTHI, Pfr. C. testd clause umbili- 
catd, oblongd, truncata, spiraliter confertim plicatd, lineis longi- 
tudinalibus obsoleté decussatd, sericed, pallidissimé 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, externo late patente, concentricé striato, radiatim 
plicato et castaneo-radiato, ad columellam exciso, lamind alba 
fornicatd umbilicum prorsus claudente-—Operculum terminale, 
cartilagineum, paucispirum, nucleo basali. 
Long. 22, diam. 11} mill. 
Had. 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, pallidé corned, Sfasciis an- 
gustis, rufis, interruptis ornatd, non nitente ; spird sursum atte- 
nuatd, laté truncatd ; suturd profundd, subsimplice ; anfractibus 
superstomate 4, conveais, ultimo angustiore, rotundato ; aperturd 
verticali, circulari; peristomate duplice: interno continuo, vix 
porrecto, externo dilatato, horizontaliter patente, concentricé 
striato, ad anfractum penultimum subexciso, margine sinistro fim- 
briato-inciso.—Operculum planum, e duabus laminis compositum, 
externa subtestaced, anfractibus 34, nucleo subcentrali. 
Long. 14, diam. 7 mill. 
Hab. Almendares prope Havana. 
21. CycLostoma ovatuM, Pfr. C. testd obtecté 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 reflero, anfractui 
penultimo longé adnato, perforationem claudente, margine sinistro 
subauriculato, libero.—Operculum? 
Long. 173, diam. 8 mill. 
Hab. in insula Cuba. 
22. CycLostoma Grateouprt, Pfr. C. testd perforata, oblonga, 
pupiformi, truncatd, tenuiusculd, spiraliter confertim sulcatda et 
costis longitudinalibus, conferlis, non interruptis sculpta, diaphand, 
