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1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 183 
Reeve’s specimen cannot be distinguished from the South American Ampullarius 
guyanensis (Lamarck). HE. v. Martens’ var. stwhlmanni should therefore be given 
specific rank. : 
Pila wernet (Philippi) 
Ampullaria wernet Putuippi, 1851, in Martini and Chemnitz, ‘Syst. Conch. 
Cab.,’ I, 20, p. 19, Pl. xvi, fig. 2 (not Pl. v, fig. 4, which is P. charmesiana) (type 
locality: White Nile). E. A. Smrru, 1888, Proc. Zoél. Soc. London, p. 53. DaurzENn- 
BERG, 1891, Bull. Ac. Se. Belgique, (3) XX, (1890), p. 569. Germain, 1905, Bull. | 
Mus. Hist. Nat. Paris, p. 328; 1908, A. Chevalier, ‘L’ Afrique Centrale Frangaise,’ 
p. 5380. C. R. Barrcrr, 1913, Ann. Soc. Zool. Malacol. Belgique, XLVII, (1912), 
p. 102. 
It seems doubtful whether P. wernei actually occurs within our territory. Smith 
(1888) says that two young shells collected in Lake Albert by 8. Baker (1864) ‘‘appear . 
to be the early ‘stages of this species.’! Dautzenberg (1891) records it from the 
islands below Fort de Possel in the Ubangi River (Foureau Coll.) and C. R. Boettger 
(1913) from the Kasai River (Wissmann Coll.). We are inclined to believe that these 
Congo records are all based on erroneous identifications. 
LaNnistes Denys de Montfort 
Lanistes DENys DE Montrort, 1810, ‘Conchyl. Systém.,’ IT, p. 122. Monotype: 
Lanistes oliverii Denys de Montfort =Cyclostoma carinata Olivier. 
Ampullaria subgenus Lanites Swarnson, 1840, ‘Treatise on Malacology,’ p. 
339. Misspelling of Lanistes. 
Meladomus section Libyciana Bourauianat, 1889, ‘Moll. Afrique Equator.,’ 
p. 176. Type by present designation: Ampullaria libyca Morelet. 
Meladomus section Bolteniana BourRGuiIGNaT, 1889, op. cit., p. 178. Type by 
present designation: Helix boltentana Chemnitz = Cyclostoma carinata Olivier. 
Meladomus section Nyassana BourGcuiIGNnat, 1889, op. cit., p. 179. Monotype: 
Lanistes nyassanus Dohrn. 
Ampullariidz with the shell sinistral, the operculum wholly corneous. 
The soft parts are dextral as in Pila, and the left epipodial lobe is rather short. 
Bouvier {1891, Le Naturaliste, (2), No. 103, pp. 143-147/ has figured 
living Lanistes carinatus which he kept in an aquarium. The very short 
siphon is incapable of extension materially beyond the edge of the shell. 
Lanistes purpureus was said by O. Neumann to be viviparous (KH. v. 
Martens, 1897, ‘Deutsch Ost Afr., IV, Beschalte Weichth.,’ p. 163). A. 
d’Ailly (1896, Bihang Svenska Vet. Ak. Handl , Stockholm, XXII, Afd. 
4, No. 2, p. 126), however, described the eggs of L. lybecus, of Cameroon, 
which, he says, are agglomerated on aquatic plants; one of the masses 
contained fifteen spherical eggs, 3.5 mm. to 4 mm. in diameter, with a 
rather strong, transparent membrane. We found no embryos in the 
specimens we have opened, four of L. procerus langi, about twenty of Li 
nsendweensis, and nine of L. graueri, though the majority were females. 
anc 
1These specimens had been referred to Lanistes by H. Adams (1866, Proc. Zool. Soc. London, p. 
376). ; 
