1927] Pilsbry-Bequaert,, The Aquatic Mollusks of the Belgian Congo 147 
P. africana globosa (Morelet) and it is probable that those from Shinsenda belonged to 
the same subspecies. 
Physopsis africana var. stanleyana (Bourguignat) 
Physopsis stanleyana BourGuiGNatT, 1879, ‘Descript. Moll. Egypte,’ p. 14 (type 
locality: Kingani River near Bagamoyo, Tanganyika Territory). 
Physopsis stanleyt Bourguignat. A. T. p—E RocHEBRUNE AND GERMAIN, 1904, 
Mém. Soc. Zool. France, XVII, p. 10. 
Physopsis africana var. stanleyi Bourguignat. DauTzENBERG AND GERMAIN, 
1914, Rev. Zool. Afric., IV, 1, p. 47. 
Dautzenberg and Germain have recorded this form from Stanleyville, Kindu, 
and Lake Moero at Lukonzolwa (J. Bequaert Coll.). The specimens from Stanley- 
ville we have examined and find that they agree with what is treated above as P. 
africana var.; those from Lukonzolwa are P. a. globosa (Morelet). 
Physopsis tanganyice E. v. Martens 
Physopsis tanganyice E. v. Marrens, 1897, ‘Deutsch Ost Afr., IV, Beschalte 
Weichth.,’ p. 144, Pl. vi, fig. 12. E. A. Smira, Proc. Malacol. Soc. London, VI, 2 
p. 99. Ancry, 1907, Bull. Scientif. France et Belgique, (5) IX, (1906), p. 249. 
Lake Tanganyika: originally described from the lake without more definite 
locality (Reichard Coll.). | 
Physidz 
Shell sinistral, ovate or oblong, usually glossy, similar to Bulinus. 
Animal without a pseudobranch; the foot tapering to a point behind; tentacles 
long and slender. Radula having rastriform teeth in V-shaped rows, the side teeth 
all alike. 
PuysA Draparnaud 
Physa DRAPARNAUD, 1801, Tableau, pp. 31, 32. 
True Physex exist in northwestern Africa and also in Lower Egypt. 
According to Pallary (1909, Mém. Inst. Egyptien, VI, 1, p. 54), Bour- 
guignat’s Physopsis letourneuat (1879, ‘Descript. Moll. Egypte,’ p. 16) 
and Physopsis lhotellerii (1879, op. cit., p. 17) were based on young speci- 
mens of Physa acuta Draparnaud and Physa subopaca Lamarck re- 
spectively. Pallary (1903, Bull. Inst. Egyptien, (4) III, (1902), p 
89, Pl. 1, fig. 1) has also described a Physa subopaca var. nilotica from 
Ee haloin: White Nile. 
Physa (Aplecta) waterloti Germain, 1911, Bull. Mus. ait, Nat. 
Paris, p. 322, fig. 57 (on p. 823), of Porto-Novo, Dahomey, has much the 
shell-characters of true European Physe. Its soft parts and radula are 
unknown, any surmises as to its relationships would be unwarranted. 
Physa mosambiquensis Ciussin, 1886, in Martini and Chemitz, ‘Syst. Conch. 
1According to P. Manson-Bahr and N. H. Fairley (1920, Parasitology, XII, p. 49), Physa subopaca 
is common in the Canal Zone, Lower Egypt. 
