1927) Prlsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 14] 
Bulinus (Pyrgophysa) o osoriot (A. Nobre) = Physaosarioi A. Nosre, 1905, Annaes 
Sc. Naturaes. Porto, IX, p. 15 (of separate), Pl. 1, figs. 31-32. Gumba, eer 
Bulinus (Piparohaeen scalarts (Dunker). “< p. 142. 
Bulinus (Pyrgophysa) schmidtii Dunker=Bulinus schmidtti DUNKER, 1858, 
“Ind. Mollusc. Guin. Infer.,’ p. 9, Pl. 11, figs. 7-8. Benguela. 
Bulinus (Parga susan scone (Morelet) =Physa semiplicata MorELET; 
1868, ‘Voy. Welwitsch, Moll. Terr. Fluv.,’ p. 91. District of Pungo Andongo (near 
Mopopo and the Caranxa River) and also in the territory of Ambriz, Angola. This 
name is preoccupied by Physa semiplicata Kuster (1841-43), but as Morelet’s species 
is probably a synonym of B. forskalzi, it seems unnecessary to rename it. 
Bulinus (Pyrgophysa). turriculatus (Morelet)=Physa turriculata MorE.et, 
1868, ‘Voy. Welwitsch, Moll. Terr. Fluv.,’ p. 92, Pl. rx, fig. 7. Near the Lucala 
River, Angola. 
. Bulinus arp nine) wahlbergi (Krauss)=Physa wahlbergi Krauss, 1848, 
‘Stidafrik. Mollusk.,’ p. 84, Pl. v, fig. 18. Limpopo River, Transvaal. This is 
frequently sepatder as a synonym of B. forskalit. 
Bulinus (Pyrgophysa) forskalii (Ehrenberg) 
Plate XI, Figures 9, 9a 
I sidora forskalii EaRENBERG, 1831, ‘Symbole Physice, Evertebrata, I, Mollus- 
ea,’ p. [20] (type locality: Damiette, Lower Egypt). 
Isidora forskalt Ehrenberg. E. v. Martens, 1897, ‘Deutsch Ost Afr., IV, 
Beschalte Weichth.,’ p. 141, Pl. 1, fig. 15. 
Bullinus (Pyrgophysa) forskali Ehrenberg. DauTzENBERG AND GERMAIN, 1914, 
Rev. Zool. Afric., IV, 1, p. 48. 
Pyrgophysa forskhali Ehrenberg. Pauuary, 1923, Archives Inst. Pasteur Afr. 
du Nord, ITI, p. 31. 
Pyrgophysa nyangweensis PutzEys, 1898, Ann. Soc. Malacol. Belgique, XX XIII, 
Bull. Séances, p. vi, fig. 6. | 
Physa jickelit ‘Krauss’ JickEui1, 1874, Nova Acta Ac. Nat. Cur. Dresden, 
XXXVH, 1, p. 199 (as a synonym of P. poracauay 
Phydi vitrea ‘‘Parreyss”’ JICKELI, 1874, op. cit., p. 199 (as a synonym of P. 
forskalit). 
Physa spiralis Férussac, 1827, Bull. Univ. Se. Nat., X, p. 408 (nomen nudum). 
GeRMAIN, 1921, ‘Faune Malacol. Terr. Fluv. Iles Mascareignes,’ p. 235, Pl. v1, 
figs. 6-14 (as a synonym of P. forskali). 
Karungo, east of the Semliki River (Stuhlmann Coll.). Lake Kisale at Kikond- 
ja (J. Bequaert Coll.). Nyangwe (Dupuis Coll.; type locality of P. nyangweensis). 
Bambili (J. Rodhain Coll.). 
The specimens are perforate, slender, with a fine beet and spaced 
axial laminge on some early whorls, and agree with specimens and figures 
passing under this name.’ 
The largest example from Bambili measures: 
Length, 12 mm.; diameter, 3.6 mm.; aperture, 4.5 mm.; 6 whorls. 
1Ehrenberg’s type was a very young shell, relatively wider, the diameter about half the length. 
Jickeli has figured a series showing changes of contour with age. 
