PLATE XXV 
Figs. 1-1f. Potadoma ponthiervillensis (Dupuis and Putzeys). Stanleyville. 
Figs. 2-2f. Potadoma ponthiervillensis mut. spoliata (Dupuis and Putzeys). 
Stanleyville. 
Figs. 3-3e. Potadoma superba Pilsbry and Bequaert. Affluent of the Tshopo 
River. Type (Fig. 3) and paratypes. 
Fig. 4. Potadoma mungwana Pilsbry and Bequaert. Tshopo River. Type. 
Figs. 5-5a. Potadoma superba mut. inculta Pilsbry and Bequaert. Affluent of 
the Tshopo River. Type (Fig. 5a) and paratype. 
All figures natural size. 
