251 



ultimo non descendente ; umbilico jnediocri, profunda; aperturd vix 

 ohliqud, rotundato-ovali ; peristomate sbnplice, recto, acuto, con- 

 tinuo, breviter adnata, superne vix angulato. — Operculum mem- 

 branaceum, pallid e corneum, rectispirum, extus profundi concavum. 



Diam. maj. "20, min. 15^, alt. 12 mill. 



Hab. in Brasilia. 



40. Cyclostoma guttatum, Pfr. C. testd umbilicatd, depressd, 

 solidd, glabra, nitidd, late castaned, maculis albis subtriangulari- 

 bus guttatd ; spird vix elevatd, apice fused, submucronatd ; an- 



fraclibus 4^, convexiusculis, celeriter crescentibus, ad suturam im- 

 pressam striatulis ; umbilico latiusculo, pervia ; aperturd parum 

 obliqud, circulari, intus albidd; peristomate subduplice : interna 

 vix distinguendo , externa expansa, superne in linguam brevem, 

 anfractui penultima adnatam, dilatato. — Operculum} 

 Diam. maj. 19, min. 15, alt. 9 mill. 

 Hab. ? 



41. Cyclostoma ignescens, Pfr, C. testd perfaratd, glaboso- 

 conicd, tenui, lineis spiralibus subtilissimis confertim sculptd, dia- 

 phand, nitidd, ignescente ; spird turbinatd, abtusiusculd ; suturd 

 profundd ; anfractibus 4^, convexis, ul(imo basi distinctius sulcata ; 

 aperturd obliqud, subcirculari ; peristomate simplice, expanso, mar- 

 ginibus approximatis , non junctis. — Operculum} 



Diam. maj. 14, min. 11, alt. 11^ mill. 

 Hab. in Nova Hibernia. 



42. Cyclostoma fuscxjlum, Pfr. C. testd angustissim.e umbili- 

 catd, globoso-conicd, tenul, lineis elevatis spiralibus subcanfertis, 

 lirdque periphericd validiore cariniformi sculptd, vix nitiduld, 

 unicolore fusculd , fascid unicd angustd rufd infra carinam pallidam 

 arnatd; spird conicd, abtusiusculd; anfractibus 5, convexis, ultimo 

 interdum carind, secunda superne natata, basi minute spiraliter 

 sulcata ; aperturd parum obliqud, rotundato-ovali ; peristomate 

 simplice, tenui, undique expansiusculo, marginibus approximatis, 

 non junctis. — Operculum testaceum, planum, cinereum, 4-spirum, 

 nucleo subcentrali. 



Diam. maj. 11|, min. 9^, alt. 9 mill. 

 Hab. ? 



43. Cyclostoma castaneum, Pfr. C. testd anguste umbilicatd, 

 globoso-conicd, tenui, oblique striatuld et liris subacutis multis 

 sculptd, nitidd, saturate castaned; spird elevata-conicd, apice ab- 

 tusiusculd ; anfractibus 4^, angulato-canvexis, ultimo liris 6 sub- 

 eequalibus, pluribusque minoribus, canfertioribus in umbilico mu- 

 nito ; aperturd parum obliqud, subcirculari ; peristomate simplice, 

 tenui, undique expansiusculo, marginibus approximatis, non junctis. 

 — Operculum testaceum, planum, paucispirum, nuclea subcentrali. 



Diam. maj. 11, min. 9, alt. 9 mill. 

 Hab. in insula Madagascar. 



To this was added the following description of various species of 

 Helicea. 



