Note 320 — APPENDICE
Reading edition
Smith (E. A.), On a collection of land shells from British central Africa ; in : Proceed. zoolog. soc. London, 13 avril 1899. Thapsia masukuensis, p. 583, Pl. XXXIII, fig. 19-20 ; Th. mixta, p. 582, fig. 13-14-15 ; Th. simulata, p. 583, fig. 21-22-23 ; Th. decepta, p. 584, fig. 26-27-28.