122 Mr. E. A. Smith on the Shells of the 



lat." It is a variety of the Cleopatra Guillemei of Bour- 

 guignat and perfectly distinct from hulimoides^ having the 

 upper whorls sharply angled and the base of the body-whorl 

 around the umbilicus encircled with five strong concentric 

 lirae. 



Considering, therefore, the doubt attaching to the localities 

 of the specimens in question, it seems to me advisable to 

 exclude these five species from the list of the lake shells until 

 their occurrence there has been further established. 



The next mention of shells from the Oukdr^wd lake occurs 

 in the ' Sitzungsberichte der Gesellschaft naturforschender 

 Freunde zu Berlin ' for 1879. At p. 105 Dr. E. von Martens 

 enumerated nine species collected by Emmin Effendi in 1877 

 on the south-west shores, as follows : — 1. Physa, sp. ; 2. Plan- 

 orhis choanomjihalus, sp. n. : 3. Paludlna ruhicunda^ sp. n. 

 4. Paludina capillata^ Frfld. ; 5. Bythinia Stanleyi, Smith 

 6. Melania tuberculata^ var. ; 7. Unio Baken, H. Adams 

 8. U, acuminatus, H. Ad. ; 9. Corbicula radiata, Phil. 



M. Bourguignat in 1883 (Moll. fluv. du Nyanza Oukerewe), 

 unaware of the papers by Dolirn and Martens, mentioned the 

 following ten species as the first recorded from this locality : — 

 1. Melania tuberculata'j 2. Vivipara abysstmca ] 3. Mutela 

 suhdiaphana ; 4. Unio Hauttecoeuri ; 5. U. Grandidieri ; 6. 

 U. Dwponti ; 7. U. Ruellani ; 8. U. Edwardsianus ; 9. U. 

 Orantianus j 10. U. Monceti. 



In 1885 (' Esp^ces nouv. et gen. nouv. Ouk^rew^ et 

 Tanganika ') he described the following: — Cleopatra Ouil- 

 lemeij Mutela Bourguignati^ and Spatha Bourguignati. 



Finally in 1887 (Bull. Soc. Malac. France, vol. iv. pp. 267- 

 272) he enumerated the thirteen species known to him from 

 the lake, and described two others, Limncea Dehaizei and 

 Unio Lowdeli. 



I now add to the preceding three new species of Viviparas, 

 Mutela ruhens^ Lamk., and Limosina parasitica (Parreyss), 

 so that the complete list of the known shells from the lake 

 is here given. 



The fauna of the Victoria Nyanza, as far as we know it at 

 present, appears to be quite Nilotic, and no such remarkable 

 forms as occur in Lake Tanganyika have as yet been met 

 with. It does not possess a specialized fauna like that lake, 

 and out of the twenty-eight species hereafter enumerated 

 twelve ha\'e been recorded from the Nile or one or other of 

 the great lakes, and of the remaining sixteen so-called species 

 very close representatives occur in other lakes and rivers of 

 Central Africa. 



