176 Bulletin American Museum of Natural History [Vol. LIII 
Pila letourneuxi (Bourguignat) =Ampullaria letourneuxi BourGuiGNaT, 1879, 
‘Descript. Moll. Egypte,’ p. 29. Kingani River near Bagamoyo, Tanganyika 
‘Territory. 
Pila microglypta Pilsbry and Bequaert. See below. 
Pila nigricans (G. B. Sowerby) =Ampullaria nigricans G. B. SowERBy, 1910, 
Proc. Malacol. Soc. London, IX, 1, p. 63, fig. Buddu, Uganda, at 4,000 feet. 
Pila nyanzxe (E. A. Smith) =Ampullaria nyanze E. A. Smiru, 1892, Ann. Mag. 
Nat. Hist., (6) X, p. 382. Jordan’s Nullah, at the southern end of Lake Victoria. | 
Pila occidentalis (Mousson) = Ampullaria occidentalis Mousson, 1887, Journ. de 
Conchyl., XX XV, p. 299, Pl. x11, fig. 9. Cunene River. : 
Pila ovata (Olivier). See p. 181. 
Pila revoilt (Billotte) =Ampullaria revoili BrttoTTH, 1885, Bull. Soc. Malacol. 
France, II, p. 108. Between Merca and Makdischu, Somaliland. 
Pila ruchetiana (Billotte) =Ampullaria ruchetiana BiututoTre, 1885, Bull. Soe. 
Malacol. France, II, p. 105, Pl. v1, fig. 1. Webi River, above Guelidi, Somaliland. 
Pila speciosa (Philippi) = Ampullaria speciosa PutviprPt, 1849, Zeitschr. f. Mala- 
koz., VI, p. 18; 1851, in Martini and Chemnitz, ‘Syst. Conch. Cab.,’ I, 20, p. 40, Pl. 
XI, fig. 2. East Africa. 
This species has been recorded from the Uele River by Germain and de Roche- 
brune (1904, Mém. Soc. Zool. France, XVII, p. 5); from the Lobay River, an affluent 
of the Congo in French territory, by Germain (1913, Bull. Mus. Hist. Nat. Paris, 
p. 289); and from the Upper Congo by C. R. Beettger [1913, Ann. Soc. Zool. Malacol. 
Belgique, XLVII, (1912), p. 102]. The occurrence of true P. speciosa within the 
Congo basin appears to us very doubtful. 
Pila stuhlmanni (KE. v. Martens). See p. 182. 
Pila welwitscht (Bourguignat)=Ampullaria welwitschi BourRGuIGNAT, 1879, 
‘Descript. Moll. Egypt.,’ p. 31. Ampullaria ovata MorE LET, 1868, ‘Voy. Wel- 
witsch. Moll. Terr. Fluv.,’ p. 94, Pl. rx, fig. 10 (not of Olivier). Niger River. This 
appears to be a distinct species, not a variety of ovata as stated by Germain (1908, 
Journ. de Conchyl., LVI, p. 108). 
Pila wernet (Philippi). See p. 188. 
Certain authors list as African species a number of forms which were originally 
described as of doubtful provenance. Such are: Ampullaria adusta Reeve (=A. 
sordida Reeve), A. canaliculata Lamarck, A. exigua Philippi, A. filosa Reeve, and A. 
pilula Reeve. It is extremely doubtful whether any of these names apply to species 
of the African continent. 
Pila microglypta, new species 
Plate XV, Figures 5 and 6 
Stanleyville (type locality), 21 specimens (H. Lang Coll.). 
The shell is moderately umbilicate, rather solid. The spire is moderately raised, 
more or less deeply corroded in all specimens seen. The suture is deep; following it the 
whorl is horizontal and flattened, then rather abruptly curved, convex peripherally, 
then convexly tapering toward the base. Color ecru-olive to buffy olive, with 
numerous unequal bands and lines of brownish olive. Surface showing under the lens 
unequal, very minute, spiral threads and strize and far finer, closer, axial strix which 
renulate the spirals. The aperture is oblong, rather wide, nearly as wide in the 
