246 Bulletin American Museum of Natural History [Vol. LIII 
Potamides fuscatus (Linneeus). See below. 
Potamides homologus (Bayle) =Cerithium homologum BayuE, 1880, Journ. of 
Conchyl., XXVIII, p. 248; new name for Cerithium multigranum SowERBY, 1855, 
‘Thesaurus Conchol.,’ II, p. 393, Pl. cuxxx111, fig. 182 hese Africa’’). Potamides 
multigranosus ‘‘Sowerby’’ Tryon, 1887, ‘Manual of Conchol.,’ IX, p. 159 and p. 213 
(as Tympanotonos multigranosus); E. v. Martens, 1903, Wiss Ergebn. Deutsch. 
Tiefsee-Exped.,’ VII, 1, p. 19 (Prince’s Island). N ot Cerithium multigranum 
DesHayEs, 1834, ‘Descr. Coq. Foss. Env. Paris,’ IT, p. 393, Pl. x, figs. 4-5. 
Potamides (Tympanotonos) fuscatus (Linnzus) 
Plate XX, Figures 1-9 
“Te Popel’’ ApaNnson, 1757, ‘Hist. Nat. Sénégal, Hist. des Coquillages,’ p. 152, 
Pi. x, Gens tv need. 
Murex fuscatus LiInNmvs, 1758, ‘Syst. Nat.,’ 10th Ed., p. 755.. 
Potamides (Tympanotomus) fuscatus Linneus. DauTzENBERG, 1912, Ann. Inst. 
Océanogr. Monaco, V, 3, p. 42. C. R. Barremr, 19138, Ann. Soc. Zool. Malacol. 
Belgique, XLVIT, (1912),,p. 99. 
Murex radula Linnmus, 1758, ‘Syst. Nat.,’ 10th Ed., p. 756. 
Potamides (Tympanotomus) fuscatus var. radula Linneus. O. Barrcer, 1885, 24. 
u. 25. Ber. Offenbacher Ver. f. Naturk., p. 191. DautTzmENnBERG, 1912, Ann. Inst. 
Océanogr. Monaco, V, 3, p. 42. C. R. Barramr, 1913, Ann. Soc. Zool. Malacol. 
Belgique, XLVII, (1912), p. 99. 
Nerita aculeata O. F. MULLER, 1774, ‘Verm. Terr. Fluv. Hist.,’ II, p. 193. 
Murex fluviatilis GMELIN, 1791, in Linneus, ‘Syst. Nat.,’ 13th Ed. , p. 3562. The 
figure of Lister’s ‘Conchology’ (Pl. cxx11, fig. 20) cited by eres Shove that this is 
Murex radula Linneeus. 
Murex terebella Gur tin, 1791, in Linneeus, ‘Syst. Nat.,’ 13th Ed., p. 3562. Fig. 
1459 on Pl. civ of Martini’s ‘Conch. Cab.,’ IV, referred to by Gmelin, represents 
Murex radula Linneus. 
Cerithium muricatum BruGcuiIbrRe, 1792, ‘Enclyclop. Méthod., Vers.,’ I, p. 490. 
Tympanotonos owentt Renvey, 1866, ‘Conchol. Iconica,’ XV, Tympanotonos, Pl. 
Ty 1402245). 
Tympanotomus owent Férussac. H.pE Cort, 1899, Ann. Soc. Malacol. Belgique, 
XXXIV, Bull Séances, p. xl. 
Potamides (Tympanotomus) fuscatus var. oweni Reeye. DautTzENBERG, 1912, 
Ann. Inst. Océanogr. Monaco, V, 3, p. 42. 
Potamides fuscatus var. muricatus Bruguiére. E. v. Martens, 1903, ‘Wiss. 
Ergebn. Deutsch. Tiefsee-Exped.,’ VII, 1, p. 19 (Chisambo and Massabi in the 
Portuguese colony of Cabinda). 
Banana (Buchholz Coll.; P. Hesse Coll.; Gruvel Coll.). Creek of Kitompo and 
Moanda and at the Ile des Pécheurs near Banana (Gruvel Coll.). 
The species is found along the western coast of Africa from Senegal to Mos- 
samedes. Gruvel has recorded its occurrence in subfossil condition in the Bay of the 
Archimedes, Mauritania.!. This discovery is of much interest as indicating that at 
some comparatively recent time rather large rivers flowed from the Sahara into the 
Atlantic. 
2 a A Se Se ae es ee 
a A. 1922. ‘De Vorigine fluviale dela Baie du Lévrier.’ C. R. Ac. Sci. Paris, CLXXIV, 
pp. sagt 
