HYDRACHNIDAE FOUND IN THE EAST AFRICAN LAKES. 113 



4. Uniontcula Jiguralis Koch. Victoria Nyanza, Lake Tan- 



ganyika. (1, 3, 4, 5.) 



5. Unionicula cunningtoni sp. nov. Lake Nyassa. 



6. Neimiania sjnnipes Miill. Victoria Nyanza. (5.) 



7. papulosa sp. nov. Lake Tanganyika. 



8. paucipora Koen. Victoria Nyanza. (3, 4.) 



9. Encentridophorus .S2nnifer Koen. Victoria Nyanza, Lake 



Nyassa. (2.) 



10. Encentridophorus borgerti Daday. Victoria Nyanza. (1.) 



11. Arrhenurus plenipalpis 'K.oexi. Lake Nyassa. (2.) 



12. Frontipoda stuhlmanni Koen. Victoria Nyanza. (1, 4, 5.) 



13. Llmnesia armata Koen. Victoria Nyanza. (1, 4.) 



14. Fiona rotundiis Kram. ,, (1) '^O 



15. Hygrobates edeiitipalp is sp. nov. Lake Tanganyika. 



16. Mideopsis minuta sp. nov. ,, 



17. Dlplodontiis despiciens Miill. (o.) 



18. Forelia liUacea Miill. (S.) 



Bibliography. 



1. Daday, E. V. Flancton-Tiere aus deni Victoria Nyanza^ 



1907. 



2. Halbert, J. W. " Zoological Results of the Third Tan- 



ganyika Expedition, 1904-5," Froceedings of the Zool. 

 Soc.^ London, 1906. 



3. KoENiKE, F. Die von Herrii Dr. F. StvMmann in Ostafrlka. 



Hamburg, 1893. 



4. KoENiKE, F. Die Hydrachniden Ostafrikas, Berlin, 1895. 



5. PiERSiG, Dr. Ft. Das Tierreich Hydrachnidae, Berlin, 190L 



Description of Plate 5. 

 Xeumania papillosa sp. nov. 



1. Dorsal surface, ?. X 42. 



2. Ventral surface, ? . x 42, 



