PLATE XX XI 
Figs. 1-38. Parreysia leopoldvillensis (Putzeys). Zambi. 
Fig. 4. Parreysia leopoldvillensis (Putzeys). Faradje. 
Fig. 5-6. Parreysia bakeri (H. Adams). Lake Albert. 
Figs. 7-7b. Parreysia stuhlmanni (v. Martens). Kabare, Lake Edward. 
Fig. 8. Parreysia mweruensis (E. A. Smith). Elisabethville. 
Fig. 9. Parreysia mweruensis (E. A. Smith). Lukonzolwa. 
Fig. 10. Parreysia mweruensis (E. A. Smith). Kachiobwe. 
Fig. 11. Parreysia ngesiana (v. Martens). Kabare, Lake Edward. 
Figs. 12-126. Parreysia regis Pilsbry and Bequaert. Kabare, Lake Edward. 
Type. 
Fig. 13. Parreysia acuminata (H. Adams). Butiaba, Lake Albert. 
All natural size. 
