4 Bichard Hagg. 



Literature: 



1) Paludina boissierl Charpentier 61 (p. 35). 2) Bithynia boissieri ((iiak 

 prntier) 40 (p. 1149), 70 (p. 205), 93 (p. 39), 57 (p. 60), 51 (p. 11), 54 (p. 244). 

 3) Paludina boissyni (Charpentier) 54 (p. 244). 



5. Ampullaria ovata Olivier. 



a) var. Jcordofana (Parreyss). 



Alt. 103 mm. Lat. 93 mm. Length of the opening 81 mm. 

 Breadth of the same 47 mm. 



Hab. 1) South of Shendy. Several smaller dead specimens 

 the epidermis of which was thoroughly destroyed; 2) Goz Abu- 

 Gomr (White Nile). One large specimen without the animal 

 with the epidermis well preserved; 3) E-enk. 2 small specimens 

 with the animals; 4) Besides 4 large specimens without the ani- 

 mals but with the epidermis well preserved. 



The colour of the epidermis of the large specimens is a dark 

 brown, that of the epidermis of the small ones is a light brown. 



b) var. lacida (Parreyss). 



Alt. 53 mm. Lat. 40 mm. Length of opening 40 mm. 

 Breadth of the same 26 mm. 



Hob. Between G-ebelain and Renk (White Nile). One living 

 specimen. 



Geographical distribution: 1 

 Lower Egypt (Olivier [99], Bruguiere ace. to Olivier [99], 

 Roth [115], ace. to Bourguinat [10], Raymond ace. to Bourguinat 

 [10], Jickeli [54]). Oasis of Shvah (Caillaud [16]). The Egyptian 

 Shore of the Red Sea (Ehrenberg and Hemprich [32]). Middle Egypt 

 (Mousson ace. to v. Martens [71]). Kordofan (Parreyss ace. to 

 v. Martens [71]). The Upper Nile (Klot-Bey ace. to v. Martens 

 [67]). Senaar (Caillaud [16]). Djur Land (Schweinfurth ace. 

 to v. Martens [80]). Mam-Mam Land (Schweinfurth ace. to 

 v. Martens [80]) Bogamayo (Stuhlmann ace. to v. Martens: var. 



1 The main species is only to be found on the shores of the Mareotis Lake 

 (Olivikk [99]) and along the canals in the neighbourhood of Alexandria and 

 Ramie (Bourguinat [13]), the var. raymondi only on the Isthmus of Suez (L. 

 EUymovd ace. to Bourguinat [10]) and the var. lucida only in Egypt (ace. to 

 I'lin.ii'i'i [100]). In all other cases, the var. kordofana is referred to. 



