114 Bulletin American Museum of Natural History [Vol. LIII 
Zool., (7) X, p. 7, Pl.t, figs. 21-22 (originally described from Lake Tanganyika, near 
the outlet of the Lukuga and the mouth of the Malagarazi Rivers). Ancry, 1907, 
Bull. Scientif. France et Belgique, (5) IX, (1906), p. 249. — 
Limnea lavigeriana BourGUIGNAT, 1888, ‘Iconogr. Malacol. Tanganika,’ PI. 1, 
figs. 18-19; 1890, Ann. Sc. Nat. Zool., (7) X, p. 9, PI. 1, figs.18-19 (type locality: west 
coast of Lake Tanganyika between Kibanga and the outlet of the Lukuga River). 
Ancey, 1907, Bull. Scientif. France et Belgique, (5) IX, (1906), p. 249. 
Limnexa zanzibarica BouRGUIGNAT, 1889, ‘Moll. Afrique Equator.,’ p. 158 (type 
locality: Kingani River, Tanganyika Territory). 
Lake Tanganyika: between Kibanga and Karema; beach of Kibanga; outlet of 
the Lukuga River; mouth of the Malagarazi River; between Kibanga and the 
outlet of the Lukuga River. — 
It is probable that all these specimens from Tanganika belonged to v. Martens’ 
L. undussume, if indeed that form is distinct from caillaudt. 
Notwithstanding Germain’s statement to the contrary, the name cazllaudi has 
page priority over africana. On p. 85 of his 1883 paper, Bourguignat mentions, it is 
true, africana, but without description, so that it is there a nomen nudum. 
Lymnexa (Radix) caillaudi var. jouberta (Bourguignat) 
Limnexa jouberti BouRGUIGNAT, 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. 1, 
fis. 23; 1890; Ann,.Sc, Nat. Zool., @) X, p.-7, Plt, ae. 25. Ancny, 1907, Bull. 
Scientif. France et Belgique, (5) IX, (1906), p. 249. 
Lake Tanganyika: on the western coast, chiefly near the Ubuari Peninsula 
(type locality). 
Lymnexa (Radix) graviert (Bourguignat) 
Inmnexa graviert BOURGUIGNAT, 1885, ‘ Moll. Choa,’ p. 23, PL., fig. 6 (type locality: 
Lake Haussa, Abyssinia). GERMAIN, 1919, Bull. Mus. Hist. Nat. Paris, pp. 183 and 
186; 1920, ‘Voyage dans l’Afrique Orientale Anglaise (1912-1913) de G. Babault, 
Moll. Terr. Fluv.,’ pp. 181 and 185, figs. 82-87 (figs. 84-87 as L. debaizet). 
Limnexa debaizer BouRGUIGNAT, 1887, Bull. Soc. Malacol. France, IV, p. 268 
(type locality: Lake Victoria); 1888, ‘Iconogr. Malacol. Tanganika,’ Pl. 1, fig. 20; 
1890, Ann. Se. Nat. Zool., (7) X, p. 11, Pl. 1, fig. 20. E. v. Martens, 1897, ‘Deutsch 
Ost Afr., IV, Beschalte Weichth.,’ p. 136. Ancry, 1907, Bull. Scientif. France et 
Belgique, (5) IX, (1906), p. 249. 
 ?Limnea soleilleti Bourauienat, 1883, ‘Moll. Choa,’ p. 24, Pl., fig. 7 (type 
locality: Hauash River, Abyssinia). 
Lake Tanganyika: Ujiji; Kibanga; Mpala; Pambete. 
Planorbids 
Sinistral snails in which the shell may be either coiled in a plane or somewhat 
lengthened and ultrasinistral (that is, to allappearance dextral), or it may be oblong, 
Physa-shaped, and sinistral. 
Usually a large respiratory lobe or pseudobranch emerges from below the 
orifice of the lung on the left side of the animal; some species appear to have given 
up lung-breathing altogether.1. The foot is rounded behind; the tentacles are 
Sara ; ; : 3 : : 
a po as Precobrnnenes aériens et Pulmoné aquatique.’ Bull. Ac. Sci. Belgique, (3) 
