110 IIELIX §. '23. 



Microcystia Wilsoni 0. Se^np. in coll.; C. Scmper Pliilippiii. 



Ljimlnioll. p. 47. t. 2. f. H a— c. 

 Nanina Wilsoni (Tlialassia) PCilel Cat. p. 8 5. 

 Habiliil in insulis Palau: Peleliu ct Nernialck prope Corore. 

 (0. Semp.) 



479. H. tnargaritacca (Microcystis) O. Sctnper. "f 



«T. subconica, })erforala, lenuis, lactea, hydro|)liana, gla- 

 berrima ; sutura subniarginala; anfr. 6 — 6^^ lente accrescentes, 

 vix convcxiusculi, iillimus obsolete carinatus, infra tuinidus, 

 non descendens; apertura rotundato-lunaris, fere recla; perist. 

 simplex, acutum, margine columellari incrassato, non reflexo, 

 cuin niarginc superiori callo juncto. — Diam. maj. 7, min. G, 

 alt. 51/2 milL» (S.) 



Microcystis margaritacea 0. Setnp. in coll.; C. Semp. Philippin. 

 LandmolL p. 48. l. 2. L 15. 



Habitat Peleliu et Nermalck prope Corore insularum Palau. 



* 



480. Stcphus Bcns. •}• V. 105. — Ins. Andaman. 



48L succincaPfr. (Coil. 157.) 1.58. 111.63. IV. 49. V. 106. — AV/«/;m 



sttccinea Alb. — Microcyslis sxiccinea Semp. Pliil. I. p. 4 4. — 



Ins. Pliiiippin. 



482. Todarum W. & H. Blanf. -|- V. 106. — Mont. Nilglierries. 



483. Pcrrottcti Pfr. (Coil. 158.) 111. 63. IV. 4 9. V. 107. — Nanina 



Pcrrolteti Grat/. — Mont. Niigherries. 



484. vilipcnsa Bcns. -f IV. 49. V. 107. — Coylon. 



485. H. lactca (Microcystis) Scmpcr. "f 



«T. perforata, depressa, nilida, hyalina, glabra, albida; 

 spira subplanulata; sutura marginata ; anfr. 5, plani, lente ac- 

 crescentes, ultimus rotundatus, basi convexior; apcMtura fere 

 recta , lunaris; perist. simplex, acutum , margine columellari 

 declivi, reflexo, umbilicum angustum semitegente. — Diam. maj. 7, 

 min. 6, alt. 4 milL» (S.) 



Microcystis lactea C. Senip. Philippin. Landraoll. p. 47. l. 2. 

 L 9 a— c. 

 Habilat in monte Arayat insulae Luzon. 



Obs. (dnter species Philip[)incnscs laevissima , testa laclea Iranspa- 

 rcnlc lacile dignosceiida.i) 



486. umbrina Pfr. IV. 49. V. 107. — Nanma umbrina Pfr. — Ccylon. 



487. pcrfucata Bcns. -J- IV. 50. V. 107. — Nanina pcrfncata Pfr. 



— Ccylon. 



488. Thwaitcsi Pfr. (Coll. 159.) IV. 50. V. 108. — Ceylon. 



489. infans Pfr. IV. 51. V. 108. — Hclix adnata Moiiss. — Nanina 



iiifans Mart. — Bornco, Sarawak , Labiian. 



