460 Zoological Society. 



31. Cyclostoma luguure, Pfr, C. iestd perforatd, turrito- 

 ohlongd, solidd ; truncatd, liris obtusis spiralibus, costulisque sub- 

 membranaceis illas transgredientibus sculptd, fusculd, violaceo- 

 fusco late unifasciatd ; spird pariim attenuatd; suturd confertim 

 et subacute f asciculato-crenatd ; anfractibus superstomate 5, con- 

 vexiusculis, ultimo antice breviter soluto, subdescendente, dorso 

 comprcsso, basi distinctius spiraliter lirato; aperturd verticali, 

 oblique avail ; peristomate subsimplica, continuo, margine sinisti'o 

 breviter, 7-eliquis pavlh latius expansis, subundulatis. — Operculum ? 



Long. 16, diam. fere 7 mill. 

 Hab. in insula Jamaica. 



32. Cyclostoma Kusteri, Pfr. C testd perforatd, ovato-turritd, 

 truncatd, tenui, sulcis spiralibus et costulis longitudinalibus con- 



fertis regulariter granulato-reticulatd, vix nitente, diaphand,fusco- 

 corned, lineis obsoletis rufis interruptis pictd ; spird convexo- 

 turritd, late truncatd; suturd profundd, simplice ; anfractibus 

 superstomate 4, converts, ultimo angustiore, rotundato ; aperturd 

 subverticali, subcirculari ; peristomate duplice : interno breviter 

 expanso, adnata, externo campanulato- expanse, cancentrice striata, 

 antice concava, rufo-radiato, superne angulata, ad anfractmn pen- 

 ultimum angustata. — Operculumi 



Long. 14, diam. 7 mill. 



Hab. Honduras (Mr. Dyson). 



33. Cyclostoma trochlea, Pfr. C. testd perforatd, oblongo- 

 turritd, truncatd, costis flaribus spiralibus et longitudinalibus 

 subregulariter clathratd, haud nitente, j)allide fusculd, punctis 

 rufis subseriatis variegatd ; spird elongatd, trochleari, late trun- 

 catd ; suturd profundd, simplice; anfractibus superstomate 5, per- 

 convexis ; aperturd verticali, subcirculari; peristomate duplice: 

 interno vix porrecto, externo horizantaliter expanso, superne in 

 rostrum recurvatum dilatato, ad anfractum penultimum breviter 

 interrupto, latere sinistra Jnciso-crenulato. — Operculum 1 



Long. 14, diam. 6 mill. 

 Hah. ? 



34. Cyclostoma alternans, Pfr. C. testd mediocriter umbili- 

 catd, conoideo-depressd, tenuiusculd, acute multiliratd, liris al- 

 ternis minoribus, haud nitente, subepidermide pallide lutescente 

 fugace albd ; spird breviter conoideo-elevatd, obtusiusculd ; suturd 

 subcanaliculatd ; anfractibus 5, convexiusculis , ultimo rotundato: 

 aperturd parum obliqud, subcirculari ; peristomate simplice, recto, 



fusco-limbato, subcontinuo, marginibus ad anfractum penultimum 

 callo nitido junctis. — Operculum membranaceum, planum, cereum, 

 arctispirum. 



Diam. maj. 20, min. 16, alt. 10 mill. 



Hab. Madagascar. 



3.5. Cyclostoma rusticum, Pfr. C. testd late umbilicatd, de- 

 prcssd, subdiscoided, solidd, spiraliter confertim liratd, nan nitente, 

 sordide albidd, pallide fusculo irregulariter variegatd ; spird parum 



