460 Zoological Society. 



,Z\. Cyclostoma lugubre, Pfr. C. testd perforatd, turrito- 

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

 membranaceis illas transgredientibus sculptd, fusculd, violaceo- 

 fusco late unifasciatd ; spird parum attenuatd ; suturd confertim 

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

 vexiusculis, ultimo antice breviter soluto, subdescendente, dorse 

 compresso, basi distinctius spiraliter lirato; aperturd verticali, 

 oblique ovali ; peristomate stibsimplice, continuo, margine sinistra 

 breviter, reliquis paulb latius expansis, subundulatis . — Operculum} 



Long. 16, diam. fere 7 mill. 



Ilab. 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 rvjis interruptis pictd ; spird convexo- 

 turritd, late truncatd; suturd profundd, simplice ; anfractibus 

 superstomate 4, convexis, ultimo angustiore, rotundato ; aperturd 

 subverticali, subcirculari ; peristomate duplice : interna breviter 

 expanse, adnata, externa campanulat a- expanse, concentr ice striate, 

 antice concavo, rufo-radiato, superne angulato, ad anfractum pen- 

 ultimum angustato. — Operculum 1 



Long. 14, diam. 7 mill. 



Hab. Honduras (Mr. Dyson). 



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

 turritd, truncatd, costis filaribus spiralibus et longitudinalibus 

 subregulariter clathratd, haud nitente, pallide fusculd, punctis 

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

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

 canvexis ; aperturd verticali, subcirculari ; peristomate duplice : 

 inter?ie vix porrecto, externa herizentaliter expanse, superne in 

 rostrum recurvatum dilatato, ad anfractum penultimum breviter 

 interrupt a, latere sinistra incisa-crenulato . — Operculum t 



Long. 14, diam. 6 mill. 

 Hab. ? 



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

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

 ternis minoribus, haud nitente, subepidermide pallide lutescente 

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

 subcanaliculatd ; anfractibus 5, convexiusculis, ultimo rotundato; 

 aperturd parum ebliqud, subcirculari ; peristomate simplice, recto, 



fusco-limbato, subcantinua, marginibus ad anfractum penultimum 

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

 arctispirum. 



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



Hab. Madagascar. 



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

 pressd, subdiscoided, solidd, spii-aliter confertim liratd, nan nitente, 

 sordide albidd, pallide fusculo irregulariter variegatd ; spird parum 



