* 
127 Bulletin American Museum of Natural History [Vol. LIII 
IV, Beschalte Weichth.,’ p. 146, Pl. 1, fig. 17. E. A. Smirn, 1904, Proc. Malacol. 
Soc. London, VI, 2, p. 98; 1906, Proc. Zodl. Soc. London, I, p. 184. ANcEy, 1907, 
Bull. Scientif. France et Belgique, (5) IX, (1906), pp. 249 and 261. J. Ture, 1911, 
‘Wiss. Ergebn. D. Z. Afr. Exp. (1907-08),’ III, p. 209. DautzenBERG AND GERMAIN, 
1914, Rev. Zool. Afric., IV, 1, p. 40. German, 1916, Bull. Mus. Hist. Nat. Paris. 
. 195. 
: Planorbis (Planorbis) sudanicensis E. v. Martens. GERMAIN, 1921, Rec. Indian 
Mus., X-XI, p. 23. 
Planorbis sudanicus minor E. v. Martens, 1897, ‘Deutsch Ost Afr., IV, Beschalte 
Weichth.,’ p. 146. This was based upon the typical form of the species. 
a Peete) C 
Fig. 7. Planorbis sudanicus E. v. Martens. Bahr-el-Ghazal. x 14. 
The typical form has been recorded from Lake Tanganyika: swamp at Mbete on 
the southern shore (W. A. Cunnington Coll.); at the northern end (O. Baumann 
Coll.); on the eastern shore (Storms Coll.); Ufina (Lechaptois Coll.); Kibanga; 
Kokongo; Mpala. Lake Edward: on the shore near Kiruwe; young specimens at 
Vichumbi; subfossil near Katarenge (Stuhlmann Coll.). Lualaba River at Kibondo 
(between Kikondja and Bukama) (J. Bequaert Coll.). Lake Mohasi in Ruanda 
(Schubotz Coll.). : 
We have not seen the typical form from within the limits of the 
Belgian Congo. It is before us from the Bahr-el-Ghazal, collected by 
Mearns (U. 8. N. M., No. 215381), and is photographed in Fig. 7, for 
comparison with the following subspecies. The specimen figured 
measures: diameter, 11 mm.; altitude, 3 mm.; of 54 whorls. 
It appears to us doubtful whether the above-listed Congo records 
really applied to the typical form. ‘The numerous specimens which we 
have seen, partly from the same localities, all belong to the subspecies 
tanganikanus Bourguignat. E. v. Martens refers Bourguignat’s figures 
to the subspecies major. 
Planorbis sudanicus tanganikanus Bourguignat 
Plate XI, Figures 10-106 
Planorbis tanganikanus BourauiIGNaAT, 1888, ‘Iconogr. Malacol. Tanganika,’ 
Pl. 1, figs. 16-17; 1890, Ann. Sc. Nat. Zool., (7) X, p. 16, Pl. 1, figs. 16-17. Gmermatn, 
1905, Bull. Mus. Hist. Nat. Paris, p. 256. Ancry, 1907, Bull. Scientif.. France et 
Belgique, (5) IX, (1906), p. 249. ‘ 
Planorbis tanganicanus Bourguignat. E. v. Marrmns, 1897, ‘Deutsch Ost Afr., 
V, Beschalte Weichth.,’ p. 147. 
