Reference List of South African Non-marine Mollusca. 277 



C. fluminalis (Miill.) was described from the Eiver Euphrates in 

 1774, and consobrina, Calilaud (Voy. a Meroe, ii. pi. 61, f. 10, 11), 

 from Egypt in 1823. 



C. radiata, Parr, and pusilla, Parr. (Abb. u. Beschr. ii. p. 78. pi. 11, 

 4. f. 7), from Egypt, owe their origin to Philippi, 1846. 



In 1848, however, Krauss propounded the name africana, com- 

 prising two South African varieties, olivacea and albida, with which 

 he identified radiata and pusilla respectively. Olivacea is the type 

 form of africana : albida w r as raised by Clessin (1877) to the rank of 

 a species, and will probably prove to be identical with, and have 

 precedence of, C. oliphantensis, Crvn. Clessin also described and 

 figured a C. natalensis, Krs., of which no notice has been taken by 

 subsequent authors. 



Jickeli (1874) dealt with radiata and pusilla as distinct species, 

 but had not sufficient material to express an opinion as to the 

 correctness of Krauss' views on the subject. 



von Martens (1897) united pusilhi with radiata, but separated the 

 latter from africana, var. olivacea; Bottger, however (1910), con- 

 sidered radiata and africana identical. 



' , 



Pallary (Mem. Instit. Egypt, vi, 1. 1909, pp. 71, 72) appears to 

 prove that radiata and pusilla are both immature forms of conso- 

 brina, which last was placed by Jickeli (1874) and Westerlund (1890) 

 in the synonymy of fluminalis, Miill. 



The localities given in the following pages are, for the most part, 

 correct for the varieties to which they refer, but the true degree of 

 inter-relationship of the latter is obviously far too large a subject to 

 admit of adequate discussion within the limits of the present work. 



586. COBBICULA AFRICANA (Krauss). [S.A.M.] 



1848 Cyrena africana, var. olivacea, Krs. ( = gauritziana, Krs. in 

 litt. mdracliata, Parr.), Krs., Siidafr. Moll. p. 8. pi. 1, f. 8. D.F. 

 1854 Corbicula africana, Krs., Desh., Cat. Conchif. p. 222. D. 

 1859 Cyrena von Mts., Mai. Blatt. vi. p. 220. N. 



1866 Corbicula Prime, Ann. Lye. N.H. New York, 



viii. p. 224, f. 57. D.F. 

 1877 Cless., Conch. Cab. p. 156. pi. 27, 



f. 22-24. D.F. 



1904 von Mts., Die Kalahari, p. 758. N. 



Type in Stuttgart Museum. 



Hab. CAPE OF GOOD HOPE. Gauritz Eiver (Krauss). Swellen- 

 dam (Layard). Gamtoos R. (Farquhar). Port Elizabeth (Crawford). 



