288 Bulletin American Museum of Natural History [Vol. LIII 
* Other Species of Potadoma Recorded from the Belgian Congo 
Potadoma tornata (EK. v. Martens) 
Text Figure 48a-d (on page 283) 
Melania (Melanoides) tornata E. v. MARTENS, 1892, Sitz. Ber. Ges. Naturf. Fr. 
Berlin, p. 181; 1897, ‘Deutsch Ost Afr., IV, Beschalte Weichth.,’ p. 196, Pl. 1, figs. 
20:and 21,,.and Pl. yi, fis, /35. 
Duki River (Shari R.) in the district of Buessa, 950 m., in 1° 20’ N., 30° E.- 
(type locality) and Ituri River at the ferry [region of Kilo; in about 1° 35’ N., 29° 
55’ E.] (Stuhlmann Coll.). 
A photograph of v. Martens’ figure is reproduced for comparison with our 
carinate species. 
RHINOMELANIA FE). v. Martens 
Semisinus subgenus Rhinomelania KE. v. Marrens, 1901, Sitz. Ber. Ges. Naturf. 
Fr. Berlin, p. 26. Monotypic for the following species: 
Rhinomelania zenkeri (E. v. Martens) =Semisinus (Rhinomelania) zenkeri E. v. 
Martens, 1901, op. cit., p. 26, fig. Lukonje River near Bipindi, Cameroon. 
SUBFAMILY UNCERTAIN 
CLEOPATRA T'roschel 
Paludina subgenus Cleopatra TroscHEe, 1857 (?), ‘Das Gebiss der Schnecken,’ 
p. 100. Monotype: Cyclostoma bulimoides Olivier. 
Zanguebaria FiscuEr, 1881, ‘Manuel de Conchyl.,’ p. 224. Type by present 
designation: Melania amxna Morelet. 3 
The shell is perforate or imperforate, ovate-conic or turrited, of few (4 to 6) 
whorls, either smooth, spirally lirate, keeled, or nodulose. Aperture ovate, the peri- 
stome in a plane, not sinuous. Operculum concave externally, corneous, mainly 
concentric, but having a small spiral nucleus of about 144 whorls, situated near the 
columellar side, about midway of the length. 
The radula is minute. Central tooth with numerous denticles and a plain bedy. 
Marginal teeth with very broad shafts, all the side teeth having a moderate number 
of denticles (about 7 to 9) (Fig. 50a-c, C. bulimoides). 
EK. A. Smith (1911, Proc. Malacol. Soc. London, IX, 4, p. 240) has 
described and figured the animals of C. ferruginea (Lea) and C. exarata 
(v. Martens) from live specimens which he received from the Shimbi 
Hills, Kenya Colony. The animals of both Species are very much alike: 
“The proboscis in C. ferruginea is rather large, flattish, extensile and 
contractile, rather blunt at the end, and cleft longitudinally, streaked 
across with fine black lines. The tentacles, 7-8 mm. in length, are very 
slender and acutely pointed, transparent, but speckled with black. No 
neck-lappets, such as occur in Vwipara. The eyes are minute, slightly 
prominent, and situated on the outer side of the tentacles toward the 
base. Foot small, broad, widely curved in front, somewhat auriculate 
