103 



Operc. subterminale, albidum. - Diam. maj. 6, min. 5, 

 alt. 4 mill. 



Helicina modcsta Pfr. in Proc. Zool. Soc. 1853. 



Habitat in insula Tanna Nov. Hebrid. 

 607a. Helicina articulata Pfr. 



T. siiblenticularis, carinata, tenuis, striatula, nitida, ru- 

 bello-fusca, pallidius ötrigata, fasciis 2 castaneo et albo 

 articulatis ad suturam et carinam ornata; spira convexius- 

 culo-conoidea, acuminata; anfr. 47^ subplani, sensim accres- 

 centes, ultimiis infra carinam subacutara convexus; colu- 

 mella breviter recedens, callum emitten« tenuem, albidum, 

 sulco levi circumscriptum ; apertura diagonalis, subtriangu- 

 laris ; perist. simplex, rectum, acutum, marginibus vix arcua- 

 tis. — Operc. immersum, corneum. — Diam. maj. 5, min. 

 41/2, alt. 3 mill. 



Helicina articulata Pfr. in Proc. Zool. Soc. 1853. 



Habitat in insula Tanna Nov. Hebrid. 



618a. Helicina delicatula Shuttle wo rth. f 



„T. depresse conico-globosa, tenuis, obsolete et grosse 

 plicatula, sub lente lineolis flexuosis confertissimis elegan- 

 ter insculpta, vix nitida, albida, fascia unica rubescenti- 

 aurantiaca zonata; spira mediocris, conoidea, acutiuscula; 

 anfr. 5 vix convexiusculi, sensim accrescentes, ultimus mo- 

 dice descendens; apertura perobliqua, integra, subsemicir- 

 cularis; columella basi extus indentata, callo crassiusculo 

 parum efFuso; perist. tenue, breviter expansum, margine 

 basali in columellam vix angulatim transeunte. — Operc? 

 — Diam. maj. 71/.2, min. 6, alt. 5 mill." (Sh.) 



Helicina delicatula Shuttl. in Bern. Mittheil. 1852. 

 p. 303. Diagn. n. Moll. Nr. 3. p. 43. 



Habitat Cordova, Vera Cruz (Jacot-Guillarmod). 

 617a. Helicina retracta Poey. 



T. globoso-conica , tenuis, laevigata, peUucida, nitida, 

 carneo-rufa; spira conoidea, acutiuscula; sutura vix impressa, 

 plerumque albo-mnrginata; anfr. 5, superi convexiusculi, 



