1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 267 
species: P. aurita (O. F. Miller), P. fusca (Gmelin), and P. byronensis 
(Wood). : 
Pachymelania byronensis (Wood) =Strombus byronensis Woop, 1828, ‘Index 
Test.,’ 2d Ed., Suppl., p. 14, Pl. rv, Strombus, fig. 23. Melania owenii Gray, 1831, 
‘Zoolog. Miscellany,’ p. 10. Melania tuberculosa RanG, 1832, Mag. Zool., II, Classe 
v, Pl. x11. Melania rangii DesHAyEs, 1838, in Lamarck, ‘Hist. Nat. Anim. sans 
Vertébres, 2d Ed., VIII, p. 442. Pachymelania byroni E. A. SmirH, 1893, The Con- 
chologist, II, p. 142. Coast of Upper Guinea. We have seen specimens from 
Assinie, but the species does not appear to extend south of Cameroon. 
a b 
Fig. 44. Pachymelania fusca (Gmelin). a, inner and 6, outer side of operculum. 
Pachymelania aurita (O. F. Miller) 
Plate XXIII, Figures 1—-lc and 2-29 
Nerita aurita O. F. Mtuuer, 1774, ‘Verm. Terr. Fluv. Hist.,’ II, p. 192. No 
locality mentioned. ° 
Melania aurita O. F. Miller. Reve, 1860, ‘Conchol. Iconica,’ XII, Melania, 
Pl. x11, figs. 190a-c. . 
Claviger auritus O. F. Miller. Bror, 1874, in Martini and Chemnitz, ‘Syst. 
Conch. Cab., I, 24, Melaniaceen,’ p. 361, Pl. xxxv1, figs. 7, 7a-c, 11, and 11a; and 
Pl. xxxvil, figs. 2, 7, and 7a. 
Clavigerina aurita O. F. Miller. E. v. Martens, 1908, ‘Wiss. Ergebn. Deutsch. 
Tiefsee-Exp.,’ VII, 1, p. 19 (Chinchoxo, Massabi, and Chisambo in the Portuguese 
colony of Cabinda). ine 
Melania zonata Putter, 1851, ‘Abbild. Beschr. Conchyl.,’ II, Melania, p. 57, 
Pi. Be. | 
ete balteata Pururprt, 1851, ‘Abbild. Beschr. Conchyl.,’ III, Melania, 4th 
page of “‘Register’”’; new name for M. zonata Philippi. 
Melania histrionica ReEve, 1860, ‘Conchol. Iconica,’ XII, Melania, Pl. xxix, 
fig. 192 (‘‘Cap~ Colony’’). 
Strombus tympanorum africanus CHEMNITZ, 1786, “Syst. Conch. Cab.,’ IX, p. 
192, Pl. cxxxv1, figs. 1265-1266. | 
Io rota REEVE, 1860, ‘Conchol. Iconica,’ XII, fo, Pl. 11, fig. 13 (‘United States 2 
