reference List of South African Non-marine Mollusca. 287 
1910 Planorbis (Gyraulus) natalensis, Krs., Bttg., Abb, Senckenb. 
Naturf. Ges, Frankfurt, xxxii. p. 451. N. 
Type in Stuttgart Museum. 
Hab. Navan. Umgeni Valley (Krauss). 
Cape or Goop Horr. Port Elizabeth (fide Morelet). 
DAMARALAND. Gobabis (subfossil, Hermann), 
British BECHUANALAND. Witkop (subfossil, Schultze). 
501. PLANORBIS PFEIFFERI, Krauss. [S.A.M.] 
1848 Planorbis pfeifferi, Krs., Siidafr, Moll. p. 83. pl. 5, f.. 7. DP. 
1877 i, » sow., Conch. Icon. pl. 4,f.33. D.F. 
1882 - ,», Cless., Conch. Cab. p. 87. pl. 10 (1850), 
f. 26-28. D.F. 
1893 Planorbis bowkeri, M.& P., A.M.N.H. xii. p. 111. pl. 3,£.19. DF. 
1910 ‘3 “of. pferfferi, Krs.,’’ Bttg., Abh. Senckenb. Naturf. 
Ges. Frankfurt, xxxii. p. 451. N. 
Co-type of pferfferi in Stockholm Museum; type of bowkeri in 
British Museum. 
Hab. Navan. Umgeni Valley (Krauss). Clairmont; Umbogin- 
twini River (Burnup). 
ZULULAND (Burnup). 
Lorenzo Marques. Itschongove (fide von Martens). 
Ruopesia. Daka River (Penther). Salisbury (Miss Weineck). 
TransvaaL. ‘ Northern Transvaal”’ (bowker1, Bowker). Ranjes- 
fontein and Crocodile River, Pretoria District (Connolly). 
British BecHuaNALAND. Witkop (subfossil, Schultze). 
Melvill and Standen (Manchester Memoirs, li, 4. 1907, p. 7) 
apparently refer to some other species under the name of bowkeri ; 
the type appears inseparable from pfeifferi, Krs. 
I am not sufficiently weil acquainted with Pl. riippelli, Dkr., or 
salinarum, Morel., to confirm the synonymy suggested elsewhere 
by von Martens and Jickeli. 
502. PLANORBIS RUPPELLI, Dunker. 
1848 Planorbis riippellii, Dkr., P.Z.S. p. 42. D. 
1850 . riippellt ,, Conch. Cab. p. 41. pl.5,f.10-12. D.F. 
1866 2 riippella ,, von Mts., Mal. Blatt. xiii. p. 4. N. 
1869 is BS; 5, (=salinarum, Morel.), von Mts., Mal. 
Blatt. xvi. p. 211. D. 
1870 . : » Blanf., Obs. Geol. and Zool. Abyss. 
p. 473. N. 
