276 Annals of the South African Museum. 



1875 Spatha natalensis, Lea, Cless., ibid. p. 189. pi. 62, f. 7, 8. D.F. 



wahlbergi, Krs. p. 187. pi. 63, f. 1. D.F. 

 1891 ,, von Mts., Sitz.-Ber. Ges. Neat. Fr. Berlin, 



p. 17. N. 



Mutela Smith, A.M.N.H. viii. p. 319. N. 



1897 Spatha von Mts., D.-O.-Afr. p. 247. D. 



1900 Simpson, Proc. U.S. Nat. Mus. xxii. 



p. 898. Synonymy. 



1909 ,, ,, Kob., Abh. Senckenb. Naturf. Ges. 



Frankfurt, xxxii. p. 50. N. 



Type of wahlbergi in Stockholm Museum ; natalensis in U.S. 

 National Mus. Washington. 



Hab. TRANSVAAL. Aapies Eiver (Wahlberg ; Farquhar). Croco- 

 dile Eiver (Day). Middelburg (Crawford). 



LORENZO MARQUES. Tette (Peters). 



ZULULAND. Enseleni Eiver (Anderson). 



NATAL. Umpingave Eiver (natalensis, McKen). 



EHODESIA. Bulawayo (in coll. Crawford;. 



Also found in East Africa. 



von Martens (1897) remarks that S. natalensis, Lea, appears to 

 differ little from bloyeti, Bgt. ; Sturany and Simpson, however, 

 place it in the synonymy of wahlbergi. 



Kobelt (1909) states that he is unable to separate spathuliformis, 

 Bgt., from waJilbergi, and includes Spathella bourguignati, Ancey, as 

 a variety of Krauss' species. 



var. DORSALIS, von Martens. 



1859 Spatha wahlbergi, " Krs.," von Mts., Mai. Bliitt. vi. p. 217. 

 1897 Krs., var. dorsalis, von Mts., D.-O.-Afr. 



p. 247. D. 

 Hab. LORENZO MARQUES. Tette ; Sena (Peters). 



FAMILY CYRENID/E, Gray, 1840. 



(Syn. Bnt. Mus. pp. 133, 149.) 



GENUS COEBICULA, von Miihlfeld, 1811. 

 (Mag. Ges. Naturf. Fr. Berlin, p. r,C,. ) 



Type of Genus, C. fluminalis (Mull.) . 



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. 



