Zoological Society. 457 



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

 catd, oblongd, ti-uncatu, spiraliter ccnfertim plicatd, lineisjongi- 

 tudinalibus obsolete decussatd, senced, paUidissime fulvidd, fasciis 

 valde interruptis castanets ornatd; spird oblongd; anfraciibus 

 superstomute 3, convexiuscuUs, ultimo basi rotundato ; aperturd 

 verticali, aagulato-ovali ; peristomate duplice : interna brevi, ex- 

 pansiusculo, externa late patenie, concentrice striata, radiatim 

 plicato et castaneo-radiato, ad cobimellam excise, lamina alba 

 fornicatd umhilicum prorsus claudente. — Operculum temiinale, 



cartilayineum, paucispirum, nucleo basal i. 

 Loug. 22, diara. 11^ mill. 

 Hab. in insula Cuba. 



20. Cyclostoma radxjla, Pfr. C. testd per/or aid, ovato-oblongd, 

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

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

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

 nuatd, late truncatd ; sutiird prafundd, subsimplice ; anfractibus 

 superstomate 4, convexis, ultimo angustiore, rotundato ; aperturd 

 verticali, circulari ; peristomate duplice: interna continue, vix 

 porrecto, externa dilataio, horizontaliter patenie, concentrice 

 striata, ad anfractum penultimum subexciso, margine sinistra Jim- 

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

 externd subtcstaced, anfractibus 3^, nucleo subcentrali. 



Long. 14, diam. 7 mill. 



Hab. Almendares prope Havana. 



21. Cyclostoma ovATTJM, Pfr. C. testd obtecteperf oratd.oblango- 

 oiatd, truncatd, tenui, langitudinaliter canfertim plicutuld, sericed, 

 fusco-corned, vel paUidissime corned, macvlis rufis seriatim dispo- 

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

 riter tuberculato-crenatd ; anfractibus superstomate 5, convexius- 

 cuUs, ultima paulo angustiore, basi obsolete spiraliter sulcata; 

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

 interna breviter porrecto, externa undique dilatato, campanulato- 

 expansa, radiata-castato, superne angulatim reflexo, anfractui 

 penultima longe adnata, perfarationem claudente, margine sinistra 

 subauriculuto, libera. — Operculum^. 



Long. 17^, diam. 8 mill. 

 Hab. in insula Cuba. 



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

 pupiformi, truncatd, tenuiusculd, spiraliter canfertim sulcata et 

 castis longitudinalibus, canfertis, nan interruptis sculptd, diaphand, 

 parum nitidd, corneo-albidd, fasciis strigatim interruptis castaneis 

 ornatd; spird sursnm parum attenuatd, late truncatd; suturd 

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

 ultimis fasciculatim dilatatis, obtusis ; anfractibus superstomate 4, 

 vix convexiuscuUs, ultima antice breviter saluta, basi rotundato ; 

 aperturd verticali, ovali ; peristomate duplice : interna breviter 

 expanse, adnata, externa campanulato-patente, rufo radiata, superne 



