249 



cBqualibus, ultimo antice soluto, dorso carinato, basi rotundato, 



distinctius spiralitei- sulcata ; aperturd verticali, angulato-ovali ; 



peristomate subsimpUce, continuo, undique breviter expanso. — 



Operculum 1 

 Long. 12, diam. 5 mill. 

 Hab. ? 



31. Cyclostoma lugubre, Pfr. C. testd perforatd, turrito- 

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

 membranaceis illas transgredientibus sculptd, fusculd, violaceo- 

 fusco late unifasciatd ; spird parum attenuatd ; suturd conferiim 

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

 vexiusculis, ultimo antice breviter soluto, subdescendente, dorso 

 conipresso, basi distinctius spiraliter lirato; aperturd verticali, 

 oblique ovali; peristotnate subsimpUce, continuo, margine sinistra 

 breviter, reliquis paulb lutius exj)ansis, subundulatis. — Operculum ? 



Long. 16, cliam. fere 7 mill. 

 Hab. in insula Jamaica. 



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

 truncatd, tenui, sulcis spiralibus et castulis langitudinalibus can- 

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



corned, lineis obsoletis rufis interruptis pictd ; spird canve-xa- 

 turritd, late truncatd ^ suturd profundd, simplice ; anfractibus 

 superstomate 4, canvexis, ultimo angustiore, rotundato ; aperturd 

 subverticali, subcirculari ; peristomate duplice : interno breviter 

 expanso, adnata, externa campanulata-expanso , concentrice striata , 

 antice cancava, rufo-radiato, superne angulata, ad anfractum pen- 

 ultimum angustata. — Operculum 'I 



Long. 14, cliam. 7 mill. 



Hab. Hondm-as (Mr. Dyson). 



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

 turritd, truncatd, costis filaribus spiralibus et longitudinalibus 

 subregulariter clathratd, haud nitente, pallide fusculd, punctis 

 rufis subseriatis vat'iegatd ; spird elongatd, trochleari, late trun- 

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

 convexis ; aperturd verticali, subcirculari ; peristomate duplice : 

 interno vix porrecto, externa harizontaliter expanso, superne in 

 rostrum recurvatum dilatato, ad anfractum penultimum breviter 

 interrupta, latere sinistra incisa-crenulato. — Operculum! 



Long. 14, diam. 6 mill. 

 Hab. ? 



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

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

 ternis minoribus, haud nitente, subepidermide pallide lutescente 



fugace albd ; spird breviter canaideo-elevatd, abtusiusculd ; suturd 

 subcanaliculatd ; anfractibus 5, convexiusculis, ultimo rotundato; 

 aperturd paruin obliqud, subcirculari ; peristomate simplice, recto, 

 fusca-limbato, subcantinuo, marginibus ad anfractum penultimum 



