Zoological Society. 459 



expansiusculo, adnata, externa coniiiiao, horizontaliter expansa, 

 anfractui pemdtimo brevissinie adnata, superne angulato. — Oper- 

 culum ? 



Long. 12^, diara. 6 mill. 



Hab. ? 



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

 turritd, truncatd, tenui, lineis elevatis spiralibus et confertissimis 

 longitudinalibus {hie illic irregular ibus, subconfluentibus) minute 

 decussatd, pallide corned, lineolis rufts interruptis obsolete pictd ; 

 suturd profundii, subsimplice ; anfractibus superstomate 4, con- 

 vexis, ultimo rotundato ; apcrturd verticali, ovali-circulari ; peri- 

 stomate duplicc, interna albo, porrecto, expansiusculo, externa 

 dilatato, horizontaliter pateiite, concentrice striata, anfractui pen- 

 ultimo breviter adnata, margine sinistra angusiiore. — Operculum 

 terminale, testaceum, anfractibus 'd\, obliqui: striatis, marginibus 

 subliberis. 



Long. 17-5^, diam. 8^ mill. 

 Hab. Almendares prope Havana. 



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

 ablongd, truncald, tenui, longitudinaliter canfertim plicatd, sericed, 

 pellucidd, corneo lutescente, maculis castaneis fascial im dispositis 

 ornatd ; suturd plicis excurrentibus canfertim subcrenatd; an- 

 fractibus superstomate o, subconvexis, ultimo basi rotu7idato, antice 

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

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

 Operculum cartitagineum, planum, paucispirum. 



Long. 15, diam. 7 2 mill- 



29. Cyclostoma TL'RRiTUM, Pfr. C. testd subperforatd, turrit d, 

 truncaiuld, lineis elevatis spiralibus et longitudinalibus regulariter 

 clathratd, albidd, lineolis rufis interruptis cinctd ; suturd subpro- 

 fundd, canfertim denticulatd; anfractibus superstomate 6, convexi- 

 usculis, regulariter accrescentlbus , ultimo rotundato; aperturd verti- 

 cali, ovali, intus fulvidd; peristomate subduplice: interna continuo, 

 expansiusculo, externa superne angulatim dilatato, margine dextra 

 vix patente, columellari et sinistra exciso. — Operculum ? 



Long. 16, diam. 7 mill. 

 Hab. Hondm-as (Mr. Dyson). 



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

 long o-turritd, ti'uncatd, tenuiusculd, lineis elevatis spiralibus con- 

 fertis, cosiulisgue illas transgredientibus filaribiis confertioribus 



decussatd, diaphand, vnicalore albidd; spird elongatd ; suturd 

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

 cequalihus, ultima antice soluta, dorso carinata, basi rotundato, 

 distinctius spiraliter sulcata ; aperturd verticali, ungulato-ovali ; 

 peristomate subsimplice, continuo, undique breviter expansa. — 

 Operculum ? 



Long. 12, diam. o mill. 



Hub. .' 



