144 Bulletin American Museum of Natural History (Vol. LIII 
This South African species has generally been placed in Bulinus, but the specimens we 
have seen show an oblique truncation of the columella. 
Physopsis preclara Boureuianat, 1879, ‘ Descript. Moll. Egypte,’ p. 14. Kin- 
gani River near Bagamoyo, Tanganyika Territory. 
Physopsis rekwaensis PResTON, 19138, Rev. Yoo: Aine. 111, 1, p. 55, PI. v, fig. 
11. Lake Rikwa, Tanganyika Territory. 
Physopsis soleilleti BourcurGNat, 1885, ‘Moll. Choa,’ p. 25, Pl. 1, fig. 11. Lake 
Haussa and Hauash River, Abyssinia. 
Physopsis tanganyice E. v. Martens. See p. 147. 
Physopsis africana Krauss 
Plate XI, Figures 6, 6a 
Physopsis africana Krauss, 1848, ‘Siidafrik. Mollusk.,’ p. 85, Pl. v, fig. 14 (type 
locality: Port Natal, Natal). E. v. Martens, 1897, ‘Deutsch Ost Afr., IV, Be- 
schalte Weichth.,’ p. 142. DautzmnBERG AND GERMAIN, 1914, Rev. Zool. Afric., 
IV, 1, p. 45. Dupuis anp Purzeyrs, 1923, Ann. Soc. Zool. Belgique, LIII, (1922), 
p. 74, figs. 8-10. 
Physa werneana ‘‘Troschel” Jickxt, 1874, Nova Acta Ac. Nat. Cur. Dresden, 
_ XXXVII, 1, p. 209 (as a synonym of Physopsis africana). 
E. v. Martens records typical africana from Undussuma (Stuhl- 
mann Coll.) and.from the Nabambisso River and other brooks in the 
Niam-Niam Country (Schweinfurth Coll.). The last-named localities 
are from the region north of Faradje, from where we have seen numerous 
specimens of the subspecies globosa (Morelet), so that v. Martens’ 
material might perhaps also have belonged to that form. Of the locali- 
ties recorded by Dautzenberg and Germain for the typical form we have 
seen specimens of all, except those from Kibondo (between Bukama and 
Kikondja) and Lake Kisale at Kikondja (both J. Bequaert Coll.), and 
those we have examined we refer to the subspecies globosa (Morelet). 
We agree with Dupuis and Putzeys in attaching very little importance 
to the numerous varieties of P. africana. 
In the typical form of thisspecies from Natal, Pl. XI, figs. 6, 6a, the 
Spire is very obtuse, rounded, though variable in degree of depression, 
and the individual whorls are evenly rounded. ‘The suture is rather 
shallow, the whorl rising steeply to it. The outer lip makes a small 
angle with the whorl at its posterior insertion. The columella proper is 
very short, its truncation deep and relatively abrupt. It is often larger 
than Krauss’ type—up to 17 mm. long. 2 
We find no typical africana in the Congo material examined, but a 
form abundant at Stanleyville is intermediate between typical africana 
and the subspecies globosa (Morelet). We hesitate to attach a special 
name to it. Specimens from Stanleyville are photographed in Pl. XI, 
figs. 7 to 7d. We have seen this form from the following localities: 
