110 HELIX 8. 93. 
Microcystis Wilsoni O. Semp. in coll; C. Semper Philippin. 
Landmoll. p. 47. t. 2. f. 14 a—c. 
Nanina  Wilsoni (Thalassia) Pütel Cat. p. 85. 
Habitat in insulis Palau: Peleliu et. Nermalek prope Coróre. 
(O0. Semp.) 
419. H. margaritacea (Microcystis) O. Semper, 1 
«T. subconica, perforata, tenuis, lactea, hydrophana, gla- 
berrima; sutura submarginata; anfr. 6—6!/, lente aecrescentes, 
vix convexiusculi, ultimus obsolete carinatus,* infra tumidus, 
non descendens; apertura rotundato-lunaris, fere recta; perist. 
simplex, aeutum, margine columellari inerassato, non reflexo, 
cum margine superiori callo juncto. — Diam. maj. 7, min. 6, 
alt. 5*5 mill.» (S.) 
Microciystis margaritacea O. Semp. in coll; C. Semp. Philippin. 
Landmoll. p. 48. t. 2. f. 45. 
Habitat Peleliu et Nermalck prope Coróre insularum Palau. 
* 
480. Stephus Bens. - V. 105. — Ins. Andaman. 
481. succinea Pfr. (Coll. 157.) I. 58. III. 63. IV. 49. V. 406. — Nanina 
succinea Alb. —  Microcystis succinea  Semp. Phil. I. p. 44. — 
Ins. Philippin. : 
482. TTodarum W. & H. Blanf. 4 V. 106. — Mont. Nilgherries. 
483. Perrotteti Pfr. (Coll. 158.) lI. 63. IV. 49. V. 407. — Nanina | 
Perrotteti Gray. — Mont. Nilgherries. 
484. vilipensa Bens. '- IV. 49. V. 107. — Ceylon. 
485. H, lactea (Microcystis) Semper. 
«T. perforata, depressa, nitida, hyalina, glabra, albida; 
spira subplanulata; sutura marginata; anfr. 5, plani, lente ac- 
crescentes, ultimus rotundatus, basi convexior; apertura fere 
recta, lunaris; perist. simplex, aeutum, margine ecolumellari 
declivi, reflexo, umbilieum angustum semitegente. — Diam. maj. 7, 
min. 6, alt. 4 mill.» (S.) 
Microcystis lactea C. Semp. Philippin. Landmoll. p. 47. t. 2. 
In gua ce 
Habitat in monte Arayat insulae Luzon. 
Obs. «Inter species Philippinenses laevissima, testa lactea transpa- 
rente facile dignoscenda.» 
* 
486. umbrina Pfr. IV. 49. V. 107. — Nanima umbrina Pfr. — Ceylon. 
481. perfucata Bens. 4| IV. 50. V. 107. — Nanina perfucata. Pfr. 
— Ceylon. 
488. Thwaitesi Pfr. (Coll. 159.) IV. 50. V. 108. — Ceylon. 
489. infans Pfr. IV.51. V. 108. — Helix adnata Mouss. — Nanina 
infans Mart. — Borneo, Sarawak, Labuan. 
