—. 199 — 
euli, ultimus antice non descendens, subtus valde 
inflatus; apertura subverticalis, oblique late lunaris; 
peristoma rectum, acutum, margine columellari ad 
umbilicum triangulariter reflexo. 
Diam. maj. 17,5, min. 15,5, alt. 10 mm. 
Hab. in cacumine insulae Lan-tou prope Hongkong. 
2. Microcystis Schmackeriana n. sp. 
T. perforata, depresso-globosa, subtilissime curvato-stria- 
tula nee non lineis spiralibus subtilissimis decussata, 
nitida, pellucida, fulvescenti-cornea; anfractus 4, 
regulariter accrescentes, ultimus subtus valde inflatus, 
non descendens; apertura sat obliqua, rotundato-lunaris; 
peristoma rectum, margine columellari ad perforationem 
reflexo. 
Diam. maj. 6'/,, min. 6, alt. 4 mm, 
Hab. in insula Hongkong, leg. el. B. Schmacker; in mon- 
tibus Lo-fou-shan ipse legi. 
3. Microeystis sculpta n. Sp. 
T. depresse globosa, anguste perforata, pellucida, corneo- 
flavescens, superne subtiliter costulato-striata, infra 
peripheriam subtilissime striatula; anfraetus 4!J, con- 
vexiuseuli, ultimus ad peripheriam obtuse angulatus; 
apertura obliqua, rotundato-lunaris; peristoma rectum, 
margine columellari tenuissime reflexo. 
Diam. maj. 23],, alt. 1°], mm. 
Hab. ad vicum Tung-dshou prope Macao, leg. el. R. 
Hungerford, 
4. Microcystis glaberrima n. sp. 
T. depresse globosa, anguste perforata, sub lente sub- 
tilissime striatula, valde nitida, pellueida, pallide fulva; 
anfractus 5 convexiuseuli, ultimus non descendens; 
7* 
