BOETTGER AND HAAS: ON AFKICAN NON-MAKINE SIIELT,S. 361 



Lanistes (Meladojius) ovum (Peters). 



A magnificent set of six specimens of this Lanistes, wliicli has 

 a wide range in Africa, was obtained by le Roi. Three were collected 

 in tlie Bahr el Ghazal (February 24, 1910), and three in the Bahr el 

 Djebel near Malek (March 8, lUlO). 



CoRBICULA consobuina (Caill.). 



One specimen and a single valve of this Corhicula were obtained 

 by le lloi in the Bahr el Abiad near the island of Lakadavia 

 (February 17, 1910). 



CoUBrCDLA RADIATA (Phil.). 



Dr. le Hoi collected a single specimen of this species at Abu Simbel, 

 Nubia (February 9, 1910). 



C^LATURA NiLOTICA (Caill.), var. SE-VNAARIENSrs, Kiist. 



One specimen of this beautiful little shell was found by le Roi in 

 the Bahr el Abiad near tlie Djebel Achmed Aga (April 3, 1910). 



MdTELA NlLOTlCA, Sow. 



We have before us one specimen of this Jfidela which was 

 taken by le Roi in the Bahr el Abiad near the island of Lakadavia 

 (February 17, 1910). 



Spatha Maenoi, Jick. 



Dr. le Roi obtained a fine specinuMi of this bivalve, the type of 

 which was collected by Jickeli (Jickeli, Faima der Land- und 

 Silsswasser - Molluslcen JVord-Ost-Afr ilea's, p. 264, pi. viii, fig. 3, 

 Dresden, 1874) in the Bahr el Seraf (Marno) in the country of the 

 Nuir, where Dr. le Roi also found his specimen (March 24-8, 1910). 



_3j]TnERiA Caillaudi, Fer. 



One perfect specimen and a single valve were taken by le Roi in the 

 Balir el Abiad near the island of Lakadavia (February 17, 1910). 



