218 _ Bulletin American Museum of Natural History [Vol. LIII 
?Bulumus puteanus (EK. v. Martens) = Bithynia (Gabbia) puteana E. v. MARTENS, 
1897, ‘Deutsch Ost Afr., [V, Beschalte Weichth.,’ p. 191. Zanzibar. This species has 
not been figured, so that we feel very doubtful as to its proper subgeneric position. 
Bulimus (Paranerita) alberti (EK. A. Smith) 
Text Figure 18 
Bythinia albertt E. A. Smitru, 1888, Proc. Zool. Soc. London, p. 54. 
Bithynia (Gabbia) alberti EK. A. Smith. E.v. Marrens, 1897, ‘Deutsch Ost Afr., 
IV, Beschalte Weichth.,’ p. 190, Pl. vi, fig. 32. J. Tureie, 1911, ‘Wiss. Ergebn. D. Z. 
Afr. Exp. (1907-08),’ III, p. 210. 
Bythinia (Gabbia) alberti HE. A. Smith. Germain, 1912, Bull. Mus. Hist. Nat. 
Paris, p. 81; 1916, op. cit., p. 199, figs. 1 and 2 (on p. 200). 
Lake Albert: (type locality, without more definite indication; Emin Pasha Coll.; 
Schubotz Coll.); near Kassenje (Stuhlmann and Emin Pasha Coll.). Lake Edward: 
near Kirima, on the northwestern shore (Stuhlmann Coll.); in the lake, without more 
definite indication (Schubotz Coll.); near Kasindi and fossil in sediments 5 meters 
above the present level of the lake at Vichumbi (Gromier Coll.). 
Fig. 18. Bulimus alberti (E. A. Smith). Kabare, Lake Edward. 
Kabare, at the southern end of Lake Edward (J. Bequaert Coll.). 
A globose species with short, conic spire and obtuse apex, quite solid, 
perforate, covered with a thin, isabella colored or pale olive-buff peri- 
ostracum. The initial whorl is very little raised. All of the whorls are 
strongly convex, the last one a little flattened below the deep suture, and 
rather rapidly curving below the flattening, in the most strongly char- 
acterized examples appearing very bluntly subangular there. It ex- 
pands rather strongly near the mouth. The surface has fine, slight 
growth lines and very minute, spiral strise, most conspicuous in the region 
of the shoulder and not visible in slightly worn examples. The aperture 
is quite large, very oblique to the axis, broadly ovate, flattened by the 
contact with preceding whorl. The peristome is expanded, in old speci- 
mens thickened on the face, continuous; the outer margin, in a profile 
view, is seen to arch forward somewhat. The concave columella is 
moderately thickened within. Two fully adult shells measure: 
