MOLLUSCA FROM THE SOUTHERN SUDaN. 249 



This variety is reported from the sources and tributaries of the Upper Nile, 

 and also from Lake Tchad. 



M. Germain states that it has been taken at Querke, on the French border 

 o£ Liberia. 



LiMicOLARiA TUEEiFORMiSj von Martens. 



Limicolaria turriformis, von Martens, 1895, Nacliriclitsbl. Mai. Ges.p. 182; von Martens, 

 1898, Deutsch-Ost-Afrika, Bd. iv. Beschalte Weichthiere Ost-Afrikas, pp. 102, 103, 

 pi. 4. figs. 11, 13, & 15. 



A single specimen was found at Sheik Tomb^- It appears to be inter- 

 mediate in form between the varieties neitmanni, v. Marts, and solida, 

 V. Marts. Alt. 63, diam. 29 ; aperture, alt. 27, diam. 14 ram. 



This species has been recorded previously from the neighbourhood of the 

 Victoria Nyanza, whence came the holotype and two varieties just quoted : 

 also from Lake Tchad, but apparently not from the Bahr el-Gebel. 



Limicolaria eohlfsi, Kob. 



Limicolaria roMfsi, Kobelt, 1895, ' System, Couch.-Cab.' von Martini und Chemnitz, 

 p. 72 & pi. 23. figs. 5, 6. 



This species was taken at Hillet Abbas (two), Hillet al-Nuwer (four), 

 south end of the Bahr el-Zarafa (five), Malek (one). Sheik Tombe (two), and 

 Kiro (four), making in all eighteen specimens. Dr. le Roi also found it at 

 Tombe and Gemesa (Kanisa ?). The holotype came from the Ngadda River, 

 and the species is further reported from the neighbourhood of the Victoria 

 Nyanza, Albert Nyanza, and Albert Edward Nyanza. My largest specimen 

 is from Hillet Abbas ; it measures, alt. 42-5, diam. 18 mm. 



The occurrence at this locality is interesting, as it does not appear to have 

 been previously recorded so far north. 



The type measures, alt. 38, diam. 17 mm. 



Limicolaria smithi, Preston. 



Limicolaria smithi, Preston, 1906, Proc. Malac. Soc. London, vol. vii. pp. 89, 90. 

 Limicolaria prestoni, Boettger, 1913, ibid. vol. x. pt. vi. p. 359. 



Four specimens were found at Sheik Tombe and one at Malek. 



The holotype is from the northern shore of Victoria Nyanza. Mr. Preston 

 informs me that numerous other examples in different stages of growth have 

 been obtained in Uganda. 



linn. JOURN. ZOOLOGY, VOL. XXXII. 22 



