38 HELIX §. 7. 



Helix Tais Hombr. et Jacquin. Voy. Pol Sud. Atl. Livr. 22. t. 

 7. f. 42 — 45. 



— — Chemn. ed. IL Helix N. 782. t. 125. f. 32. 33. 



— rhais Pfr. in Zeitschr. f. Malak. 1849. p. 68. 



— tropidophora Adams et Reeve Voy. Samarang. MoU. p. 59. 



t. 14. f. 14. 



Habitat in insulis Marquesas: Borneo (Afiams). 



71. H. ornatella (Microcystis) Beck. 



T. imperforata, orbiculato-convexa, tenuis, carinata, lae- 

 vigata, nitidissima , pellucida , straminea, lutea vel fulva, uni- 

 color vel fascia 1 rufa ornata, rarius basi purpurea; spira 

 obtuse conoidea; anfr. 47^ convexiusculi, ultimus carinatus, 

 basi convexior; apertura parum obliqua, subangulato-lunaris; 

 perist. simplex, acutum, rectum, margine columellari intrante, 

 subcalloso. — Diam. maj. 1 1 Va ? ^^i"- ''^Va? ^^^- '^ i^^i^l- (ColL 

 Nr. 36.) 



Microcystis ornatella Beck ind. p. 2. N. 4. 

 Nanina (Microcystis) ornatella Beck in M. R. C. VIII. t. 3. f. 3 



a — h. (ined. ) 

 — — — Alb. Hehc. p. 59. 



Helix ornatella Pfr. Symb. 11. p. 36. 



— — Pfr. Monogr. I. p. 32 ( ex parte). 



— — Chemn. ed. IL Hehx N. 815. t. 129. f. 7-10. 



— realis Milhlf in Anton Verz. p. 35. N. 1329. 

 P? Depressior, unicolor virenti-lutea : 



Microcijstis amoemda Beck ind. p. 2. N. 6. 

 Nanina (Microcvstis) amoenula Beck in M. R. C. VIIL t. 3. 



L 5 a-d. 



Habitat in insula Pitcairn (Cuming), var. g? in insula Opara 

 (Beck). 



Obs. Distingiienda videtur ab H. Adamsi (Nr. 46.), cujiis varietatem 

 facillhne habere possis , anfractuum numero, ultimo nsque ad aperturam 

 carinato, testa pellucida, basi convexiore, etc. 



72. H. membranacea Lowe. 



T. imperforata, depressa, tenuissima, fere membranacea, 

 carinata, ruguloso-plicata, paliide cornea_, albido marmorata et 

 ad carinani acutiusculam subfasciata; spira brevis, conoidea, 

 acutiuscula; sutura impressa; anfr. 4 convexiusculi, rapide 

 acci'escentes, ultimus non descendens, basi convexus; aper- 

 tura auipla, diagonaHs, lunato-rotundata ; perist. simplex, rectuni, 

 marginibus subconniventibus, columelhiri substi^icte recedente. 

 — Diam. maj. 9^3, min. 7^2, alt. 5 mill. (ColL Nr. 37.) 



