Malac lac Tanganika. 
1! 
| 24 
| (Ce | 
sp 
À.de Vaux-Bidon, del. Imp.Edouard Bry, Paris. 
1-3. Limnotrochus Kirki, 4-7 L.Thomsoni, 8-10.L. 
Giraudi, 11-13. L.Cyclostoma, 14-17. Syrnolopsis 
lacustris, 18-21. 5. Hamyana, 22-24 S. Grandi- 
dieriana, 25-27. S.Anceyana, 28-30. $. minuta, 
999. 5. Giraud. 
