1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 339 
Closely allied forms (Cyanocyclas) are found living in South America. 
We cordially endorse Connolly’s sage remark that “It would require 
intimate acquaintance with the types and long sets of each variety to 
unravel the extraordinary tangle into which the African species of 
Corbicula have been woven.” 
The following species of Corbicula have been described from Africa. 
Corbicula africana (Krauss) = Cyrena africana Krauss, 1848, ‘Siidafrik. Mollusk.,’ 
p. 8, Pl. 1, fig. 8 (here restricted to the specimens from the Guaritz River, Swellendam 
Province). Cyrena africana var. a olivacea Krauss, 1848, op. cit., p. 8 (the speci- 
mens from the Gauritz River). Cyrena gauritziana Krauss, 1848, op. cit., p. 8 (as a 
synonym of olwvacea). 
Corbicula artint PaLtuARy, 1903, Bull. Inst. Egyptien, (4) IIT, (7902); pe 93; Pi. 
1, fig. 4 (White Nile; with var. ex colore albina Pallary). According to Pallary (1909, 
Mém. Inst. Egyptien, VI, p. 71), the following is a synonym of this: Corbicula 
lavigeriana “Bourguignat’’ GrrMatrn, 1906, Bull. Mus. Hist. Nat. Paris, p. 583. 
fig. 18b (type locality: Ugoi); C. consobrina var. lavigeriei GERMAIN, 1906, op. cit., 
p. 584. We have seen a specimen referable to C. artent from the Nile in 10° N. 
(Pilette Coll.) and it appears to be quite a distinct species. 3 
Corbicula astartina (v. Martrens)=Cyrena astartina EK. v. Martens, 1860, 
Malakoz. Blatter, VI, p. 219, Pl. 11, figs. 6 and 7 (type locality: Tete in the Zambezi 
River). Corbicula giraudi Boureuianat, 1889, Bull. Soc. Malacol. France, VI, p. 
38 (without description; from Lake Nyasa at Karonga; a synonym of C. astartina, 
according to Germain, 1906, Bull. Mus. Hist. Nat. Paris, p. 584). 
Corbicula audoint GERMAIN, 1909, Bull. Mus. Hist. Nat. Paris, p. 476; 1911, 
‘Doc. Scientif. Miss. Tilho,’ II, p. 218, Pl. 1, figs. 835-37. Several localities in the 
Eguei district, east of Lake Chad. 
Corbicula callipyga BouRGUIGNAT, 1885, ‘Moll. Choa,’ p. 37, PL, figs. 138 and 13’. 
Hauash River, Abyssinia. | 
Corbicula cunningtoni EB. A. Smiru, 1906, Proc. Zool. Soc. London, I, p. 186, PI. 
x, fig. 15. Bukoba, in Lake Victoria. 
Corbicula delessertiana Prime, 1870, Ann. Lyc. Nat. Hist. New York, IX, p. 299. 
The Pyramids, Egypt and Smyrna. Clessin supposes that this is a synonym of C. 
radiata (Philippi). 
Corbicula difficilis Primm, 1864, Ann. Lye. Nat. Hist. New York, VIII, p. 62, fig. 
7. “African septentrionalis?”’ 
Corbicula doufilei A. T. pe RocHEBRUNE AND GERMAIN, 1904, Bull. Mus. Hist. 
Nat. Paris, p. 144; 1904, Mém. Soe. Zool. France, XVII, p. 22, Pl. 11, figs. 3-5. Dufilé 
on the White Nile. | | 
Corbicula fischeri GurMatn, 1907, Bull. Mus. Hist. Nat. Paris, p. 68; 1908, in A. 
Chevalier, ‘L’Afrique Centrale Frangaise,’ p. 580, Pl. v, figs. 18-192. Mamun, 
Senussi Country, French Equatorial Africa. . ; 
Corbicula fluminalis (O. F. Miller). See p. 344. 
Corbicula foai J. Mabille. See p. 345. 
 18ervain (1890, Bull. Soc. Malacol. France, VII, p. 286) enumerated 46 alleged species of Corbicula 
from Egypt recognized by Bourguignat. As none of the new names were defined, they need not be listed 
here. See also Pallary, 1909, Mém. Inst. Egyptien, VI, p. 73; list of 39 supposed species of Corbicula 
in Bourguignat’s collection, none of them defined. More recently Pallary (1924, Mém. Inst. d’Egypte, 
VII, 1, pp. 37-39) has named many additional forms from Egypt. 
