1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 125 
Planorbis (Gyraulus ?) apertus E. v. Martens. See p. 128. 
Planorbis (Gyraulus) avakubiensis Pilsbry and Bequaert. See p. 127. 
Planorbis (Gyraulus) chudeaut Germain=Planorbis chudeaut GERMAIN, 1907, 
Bull. Mus. Hist. Nat. Paris, p. 274, fig. 23. Lake Chad at N’Guigmi. 
Planorbis (Gyraulus) cockburni Godwin-Austen = Planorbis cockburnt GODWIN- 
AUSTEN, 1883, Proc. Zo6l. Soc. London, p. 4, Pl. 1, figs. 2 and 2a-b. Sokotra. 
Planorbis (Gyraulus) coretus Dautzenberg=Planorbis coretus ‘‘Adanson”’ 
DAUTZENBERG, 1890, Mém. Soc. Zool. France, III, p. 132, Pl. 1, figs. 9a-c. Bakel, 
Sénégal. This was described as being Adanson’s ‘‘le Coret, Coretus’”; however, 
Adanson says that ‘‘les spires sont arrondies, renflées dans leur contour,’’ whereas the 
whorls are subangular in Dautzenberg’s species. The identity of the two seems 
therefore somewhat dubious; if they can be shown to be the same, Gray’s prior 
name P. adansonii will have to be used for this species. 
Planorbis (Gyraulus) costulatus Krauss. See p. 127 
Planorbis (Gyraulus) crawfordi Melvill and Ponsonby=Planorbis crawford 
MeEtvi.u AND Ponsonsy, 1893, Ann. Mag. Nat. Hist., (6) XII, p. 111, Pl. 11, fig. 20. 
Van Staaden’s River, South Africa. 
Planorbis (Gyraulus) fouladougouensis Germain. See p. 126. 
Planorbis (Gyraulus) gardet Germain=Planorbis garder GERMAIN, 1909, Bull. 
Mus. Nat. Hist. Paris, p. 475; 1911, ‘Doc. Scientif. Miss. Tilho,’ IT, p. 192, PI. 1, figs. 
33-35. Lake Chad. 
Planorbis (Gyraulus) gibbonsi Nelson. See p. 126. 
Planorbis (Gyraulus) kigeziensis Preston= Planorbis kigeziensis Preston, 1912, 
Proc. Zool. Soc. London, I, p. 190, Pl. xxxtt, figs. 5, 5a-b. Kigezi, 6,000 ft., in extreme 
southwestern Uganda, close to the border of the Belgian Congo. 
Planorbis (Gyraulus) kisumiensis Preston = Planorbis kisumiensis PRESTON, 
1912, Rev. Zool. Afric., I, 3, p. 327, Pl. xv, fig. 10. Kisumu, Lake Victoria. 
Planorbis (Gyraulus) lamyi Germain. See p. 128. | 
Planorbis (Gyraulus) leucochilus Melvill and Ponsonby = Planorbis leucochilus 
MELVILL AND PonsonBy, 1903, Ann. Mag. Nat. Hist., (7) XII, p. 607, Pl. xxx1, 
fig. 3. Killarney Lake, Pietermaritzburg, Natal. 
Planorbis (Gyraulus) misellus Morelet = Planorbis misellus MORELET, 1868, ‘Voy. 
Welwitsch, Moll. Terr. Fluv.,’ p. 85, Pl. v, fig. 5. Lake Quilunda, Angola. 
Planorbis (Gyraulus) natalensis Krauss= Planorbis natalensis Krauss, 1848, 
‘Sidafrik. Mollusk.,’ p. 83, Pl. v, fig. 9. Planorbis natalis SowERBY, 1877, ‘Conchol. 
Iconica,’*X.X, Planorbis, Pl. 1v, fig. 32. Umgeni River, Natal. 
Planorbis (Gyraulus) sperabilis Preston = Planorbis sperabilis Preston, 1912, 
Proc. Zoél. Soc. London, I, p. 190, Pl..xxxu1, figs. 4 and 4a-b. Gazi, Kenya Colony. 
Planorbis (Gyraulus) tilhoi Germain = Planorbis (Diplodiscus) telhot GERMAIN, 
1911, Bull. Mus. Hist. Nat. Paris, p. 134; 1916, ‘Doc. Scientif. Miss. Tilho,’ IT, p. 
299, Pl. 1, figs. 1, 2,and9. Lake Chad and surrounding country. 
Planorbis (Gyraulus) toukotoensis Germain =Planorbis (Paraspira) toukotoensis 
GERMAIN, 1917, Bull. Mus. Hist. Nat. Paris, p. 526, Pl. vir, figs. 9-11. Tukoto, in the 
Bakoy River, Senegambia. 
