Freshwater- Shells from Central Africa. 149 



21. Lanistes ovutn (Peters). 

 Nab. Bubu. 



22. Lanistes lihycus (Morelet). 



Ilah. Longa {Ferhdni). 



This is a well-known West- African form. 



23. Paludina, sp. ? 



A series of fifteen specimens from Huala River might 

 possibly be considered an extreme variety of P. unicolor. 



24. Pahcdina, sp. n. 



Hah. Victoria Nyanza, south shore {Emi'n and Hanning- 

 ton). 



This species, which appears to be undescribed, has a very 

 long spire and is remarkable also for tiie acute keel around 

 the periphery, which revolves up the spire just above the 

 suture. 



25. Melatiia tuherculata, Mliller. 

 Hab. Huala Hiver. 



26. Cleopatra ferruffinea, Lea. . 

 Hab. Longa {Ferhdni). 



27. Cleopatra Guillemeij Bourguignat. 

 Hab. Hadako, Ugogo. 



28. Physopsis Leroyi^ Grandidier. 

 Hab. Bubu. 



29. Corbicula radiata^ Parreyss. 

 Hab. Victoria Nyanza, south shore. 



30. Unio, sp. 



Hab. Hasvea. 



A single specimen only, closely resembling U. Edwardsi- 

 anusj Bourguignat, from the Victoria Nyanza. 



31. Spatha rubens, Lamarck. 



Hab. Njamagodjo, Victoria Nyanza ; also Niangivira, 

 Ugogo. 



