Zoological Society. 457 



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

 catd, oblongd, truncatd, spiraliter confcrtim plicaid, li/ieis longi- 

 tudinalibus obsolete decussatd. sericed, pallidissime fulvidd, fasciis 

 valde interruptis castaneis ornatd; spird oblongd; anfractibus 

 superstomute 3, convexiusculis, ultimo basi rotundato ; apertwd 

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

 pansiusculo, externa late patente, co7icentrice striato, radiatim 

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

 fornicatd umbilicum prorsus claudente. — Operculum terminale, 



cartilagineum, paucispirum, nucleo basali. 

 Long. 22, diam. 11^ mill. 

 Hah. iu insula Cuba. 



20. Cyclostoma RADULA, Pfr. C.testdperforatd.ovato-oblongd, 

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

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

 gustis, 7-ufis, interruj)tis ornatd, non nitente ; spird surstim atte- 

 nuatd, late truncatd; suturd profundd, subsimplice ; anfractibus 

 superstomale 4, convcxis, ultimo angustiore, rotundato ; aperturd 

 verticali, circulari; peristomate duplice: ijiterno continuo, vix 

 porrecto, externa dilatato, horizontaliter patente, concentrice 

 striata, ad anfractum penultimum subexciso, margine sinistra fm- 

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

 externd subtestaced, anfractibus 3^, nucleo subcentrali. 



Long. 14, diam. 7 mill. 



Hab. Almendares prope Havana. 



21 . Cyclostoma ovatum, Pfr. C. testd obtecteperforatd, oblongo- 

 ovatd, truncatd, tenui, longitudinaliter confertim plicutuld, sericed, 

 fusca-corned, vel pallidissime corned, maculis rilfis seriatim dispo- 

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

 riter tuberculato-crenatd ; anfractibus superstamate 5, convexius- 

 culis, ultimo paula angustiore, basi obsolete spiraliter sulcata; 

 aperturd verticali, ratundata-ovali ; peristomate fuscula, duplice: 

 interno breviter porrecto, externa undique dilatata, campanulato- 

 expanso, radiata-castata, superne angulatim reflexa, anfractui 

 penultimo lomfe adnata, perfarationem claudente, margine sinistra 

 subauriculato, libera. — Operculum 1 



Long. 17i, diam. 8 mill. 



Hab. in insula Cuba. 



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

 pupiformi, truncatd, tenuiusculd, spiraliter confertim sulcata et 

 costis longitudinalibus, confertis, non interruptis sculptd, diaphand, 

 parum nitidd, cor neo-albidd, fasciis strigatim interruptis castaneis 

 ornatd; spird sursum parum attenuatd, late truncatd; suturd 

 levi, crenatd: crenis superne minutis, confertis, in anfractibus 

 ultimis fasciculatim dilatatis, obtusis ; anfractibus superstamate 4, 

 vix convexiusculis, ultima antice breviter soluto, basi rotundato ; 

 aperturd verticali. ouali ; peristomate duplice: interna breviter 

 expanse, adnata, externa campanulala-patentc, rvfo radiata, superne 



