Zoological Society. 4^9 



exjjanslusculo, adnata, externa cantinuo, horizantaliter expanse, 

 . an/raclui penult iino brevissime adnata, superne angulato. — Oper- 

 culum 1 

 Long. 12y, diam. 6 mill. 

 Hab. ? 



27. Cyclostoma pallidum, Pfr. C. testd perforata, ovato- 

 turritd, truncatd, tenia, lineis elevatis spiraiibus et canfertissimis 

 longitudinalibus {hie illic irregularibus, subconfluentibus) minute 

 decussatd, pallide earned, lineolis rufis interruptis obsolete pictd ; 

 suturd profundd, subsimplice ; anfractibvs superstamate 4, con- 

 vexis, ultima rotundato ; aperturd verticali, avali-circulari ; peri- 

 stomate duplice, interna alba, porrecta, expansiuscula, externa 

 dilatata, horizantaliter patente, cancentrice striata, anfractui pen- 

 ultima breviter adnata, margine sinistra angustiore. — Operculum 

 terminale, testaceum, anfractibus '6\, oblique striatis, marginibus 

 subliberis. 



Long. 17^, diam. 8y mill. 

 Hab. Almendares prope Havana. 



28. Cyclostoma Cumanense, Pfr. C. testd perforatd, tvrrita- 

 oblangd, truncatd, tenui, longitudinaliter confertim plicatd, sericed, 

 pellucidd, corneo-lutescente, maculis castaneis fasciatim dispositis 

 ornatd; suturd plicis excurrentibus confertim subcrenatd; an- 

 fractibus superstamate 5, subconvexis, ultimo basi rotundato, antice 

 breviter soluta, dorso carinata ; aperturd subverticali, ovali, superne 

 subangulatd ; peristamate libera, simplice, undique vix expanso. — 

 Operculum cartilagineum, planum, paucispirum. 



Long. 15, diam. 7\ mill. 



29. Cyclostoma TURRiTTJM, Pfr. C. testd subperforatd,turritd, 

 truncatuld, lineis elevatis spiraiibus et longitudinalibus regulariter 

 clalhratd, albidd, lineolis rufs interruptis cinctd; suturd subpra- 



fundd, confertim denticulatd ; anfractibus superstamate 6, convexi- 

 usculis, regulariter accrescent ibus, ultimo rotundato; aperturd verti- 

 cali, ovali, intus fulvidd ; peristamate subduplice : interna cantinuo , 

 expansiuscula, externa superne angulatim dilatata, margine dextro 

 vix patente, columellari et sinistra exciso. — Operculum 1 



Long. 16, diam. 7 mill. 



Hab. Honduras (Mr. Dyson). 



30. Cyclostoma diaphanum, Pfr. C. testd subperfaratd, ob- 

 longo-tnrritd, truncatd, tenuiusculd, lineis elevatis spiraiibus con- 

 fertis, castulisque illas transgrediefitibus filaribus confertioribus 



decussatd, diap/iand, unicolore albidd; spird elongatd ; suturd 

 irregulariter crenatd ; anfractibus superstamate 4^, convexis, sub- 

 eequalibus, ultimo antice soluto, dorsa carinata, basi rotundato, 

 distinctius spiraliter sulcata ; aperturd verticali, angulata-ovali ; 

 peristamate subsimplice, continue, undique breviter expanso. — 

 Operculum 1 

 Long. 12, diam. 5 mill. 



