Egyptian Moll u sea 103 



ceding forms at Marg. Teilhard obtained specimens at Matarieh 

 and Lhotellerie from the Mahmoad Canal near Alexandria. 



Fig. G8.— Bullimis iniiesi. (x 2.) 



BuUiiius iniiesi on sonic occafiiois ivas found infected with 

 cercaria of Bilharzia hcBmatohiuni (sens, strictu). 



BuUinus {Pijrgophysa) forskali, Ehrenberg, 1831. 



Fairly common in the canal in the village at Marg and in the 

 small subsidiaries. It was apparently absent from the Zoological 

 Gardens. It is stated by Pallary to occur throughout the course 

 of the Nile. In the Sudan Mrs. Longstaff found a specimen alive in 



Fig. G9.— BuUinus {Pyygophysa) forskali. (x 2.) 



Lake Shambe, and Dr. Innes describes material from a marsh 

 near the Blue Nile. 



BuUinus {Physopsis) spp. 

 Pallary considers the records of the occurrence in Egypt 

 (Damanhour) of this sub-section of the genus BuUinus as referable 

 to young specimens of Physa acuta and P. subopaca. 



(?) Physa acuta, Draparnaud, 1805. 



Some specimens collected from a pond north of Suez and sub- 

 mitted for diagnosis by Lieutenant-Colonel A. Balfour, C.M.G,, 

 appear to belong to this species. They closely resembled the species 

 illustrated in fig. 70, but were twice the size. 



