rectum, acutum, margo columellaris paullum calloso-in- 
crassatus, superne breviter reflexus. 
Diam. 2,5, “alt 3,2. mm: 
Than-moi, Mansongebirge. 
14. Kaliella tongkingensis n. sp. 
T. punctato-perforata, elate turbinata, tenuis, pellueida, 
subtiliter sed distincte striatula, nitens, pallide lutescens. 
Spira valde elevata, subgradata, lateribus convexiuseulis 
apice acutulo. Anfr. 7 modice convexi, sutura per carinam 
exsertam filari disjuncti, ultimus acute carinatus. Apert. 
modice obliqua, late elliptica, modice excisa; peristoma 
rectum, acutum, margo columellaris calloso-incrassatus, 
longiuscule reflexus. 
Diam. 4,4, alt. 5 mm. 
Than-moi, Mansongebirge. 
15. Kaliella gradata n. sp. 
T. anguste et semioblecte perforata, globoso-conica, 
tenuis, pellucida, subtiliter striatula, nitens, pallide lutescens. 
Spira gradata, modice elevata, lateribus sat convexis. 
Anfr. 7 convexi, lente accrescentes, sutura profunde impressa 
disjuncti, ultimus vix subangulatus, basi subplanatus. Apert. 
parum obliqua, elliptica, regulariter excisa; peristoma 
reetum acutum, margo columellaris superne subcallosus, 
reflexus, perforationem semiobtegens. 
Diam. 3,6, alt. 2,7 mm. 
Than-moi. 
16. Microcystina tongkingensis n. SP. 
T. angustissime perforata, depresse conoideo-globosa, 
tenuis, pellucida, subtiliter striatula, nitens, corneo-brunnea. 
Spira modice el vata lateribus substrietis. Anfr. 5 planulati, 
sutura distinete marginata pallida disjuneti, ullimus inflatulus. 
Apert. modice obliqua, subeireularis, sat exeisa; peristoma 
