— 303 — 



Hti iiisei'tioncin subauriculato deiniim stiicUusculo, culumeilari diia- 

 (a(ü sublibcro. Operculum testaceiim, ciassum, inlns rufuni, exfus 

 album, mar2;ine crasso clcvato cinctum, in centro tubcrculis cras- 

 sis elevatis flcxuosls obsitum. 



Diam. inaj. 14, min. 11 5 Alt. 11 niiil. 



Syn. flelicina virginca var. Sowb. Tlic«. tab. 3, f. 114. 



Trochalella virginea Pf. I\ion. Pncum. p. 32J), NO 2, 



quoad descr. opcpculi ! 

 Ilab. Haiti (Salle). 

 Obs. Hjcc et pia)cedens, a cl. Pfeiffer commixt.e, cliaracteribus 



(esta; et opercuJi facillinie distinguendcT, Tr. virnine?e, speci- 



niina 3, opiiiia) 2, oniiiia operculis clausa, ab Am. Cuming: ac- 



cepi, sine dubio a Salle lecta. 



flelicina 8aiiclozi Shultl. 



Testa conico-globosa, tenuiscula, la^vigata, vix nitidiuscula , 

 soidide albida; spira conoidca, acutiuscula; anfr. o^/o, pianiusculi, 

 ultimus roUindatus, basi inflatus, antice subascendens ; apertura 

 lunaris, parum obliquaj columella brevis, arcuata, ba.si in tuberculo 

 dcntiformi incrassata, callo tcnui effuso ; perist. conspicue incras- 

 satum, brevissime expansum, niargine dextro flexuoso, basali pone 

 tuberculum obtuse subexciso. Operculum? 



Diam. m«j. 11, min. 91/2; Alt. mül. 

 Hab. Mexico (Sandoz, comm. Nicolet). 

 Obs. Species distinctissima, ex incisura peristomatis Alcadias pau- 



lulum approximans, sed testa? forma, et tcxtura potius forsan 



H. turbinatae Wiegm. affinis, ad cxemplaria perpauca descripta. 



Heliciiia delicatula Shutil. 



Testa depresse conico-globosa, tenuis, obsolete et gi'osse pli- 

 catula, sub lente lineolis flexuosis confertissimis eleganter insculpta, 

 vix nitida, albida, fascia unica rubescenti-aurantiaca zonala ; spira 

 mediocris, conoidea, acutiuscula; anfr. 5, vix convexiusculi, sen- 

 sim accrescentes, ultinius ?nodice descendens^ apertura perobliqua, 

 integra, subsemicircularls; columella basi extus indentata, callo 

 crassiusculo parum effuso 5 perist. tenue, breviter expansum, raar- 

 gine basali in columellam vix angulatim transeunte. Operculum? 



Diam. maj. 7^/2, min. 6; Alt. 5 mili. 

 Hab. Cordova, Vera Cruz (Jacot-Guillarmod). 

 Obs. Species pulchella forsan prope H. ISeritella Lam. collocanda, 



sed textura et sculptura mlnujissima ab affinibus distincta. 



Specimen unicum coram me habeo. 



Ileliciiia chrysocheila Shutil. 



Testa depresse subgloboso-conica, solidula, tenuissime stria- 

 tula, lineisque 3 — 4 impressis spiralibus remote clrcumdata, flaves- 



