246 Annals of the South African Musewm. 
Hab. Transvaau. River Limpopo (wahilbergi, Wahlberg). Pre- 
toria (Farquhar). 
Care or Goop Horpgz. Brickfields, Grahamstown (gradata, Far- 
quhar). 
Natat Pietermaritzburg ; Durban; Thornville (Burnup). 
Also said to be found in North and East Africa, Aden, Cape Verde 
Islands, Angola and Benguela. 
Jickeli (1874) includes in the synonymy wahlbergi, Krs. ; lamellosa, 
Roth; scalaris and schmidti, Dkr.; fischeriana, Bgt.; capillacea, 
clavulata, semiplicata, turriculata and apiculata, Morelet; beccari, 
Paladilhe ; vztrea, Parr. ; and jickelii, Krs. 
521. IstpoRA NATALENSIS (Krauss). [S.A.M.] 
1841, 43 Physa natalensis, Krs., Kiist., Conch. Cab. (Limn.) p. 8. 
pl. 1, f. 12-14. DF. 
1848 Physa natalensis, Krs., Siidafr. Moll. p. 84. pl. 5, f. 10. DF’. 
1856 2“ » Bgt., Rev. et Mag. Zool. vil. p. 237. D. 
” 7 ‘i ,. Amon. mabicyaeepsiy6: 2: 
1869 Pp » von Mts., Mal. Blatt. xvi. p. 214. WN. 
1873 a 4. pow., Conchlcon. pl 10} 795 Dee 
1874 Isidora natalensis ,, Jick., Fauna N.-O.-Afr. p. 196. N. 
1883 Physa natalica, Bgt., Ann. Sci. nat. Paris, xv. pp. 98, 126. N. 
1903 »  euluensis, M. & P., A.M.N.H. xii. p. 606. pl. 32,1.4. DF. 
1910 Isidora natalensis, Krs., Bttg., Abh. Senckenb. Naturf. Ges. 
Frankfurt, xxxii. p. 453. N. 
Type of natalensis in Stuttgart Museum ; zudwensis in British 
Museum. 
Hab. Narvau. Umgeni Valley (Krauss). Durban (Burnup). 
Kast ZuLuLanp (zulwensis, Burnup). Lake Sibayi (Toppin). 
Lorenzo Marquzs. Rikatla and Monguane Lakes (Junod). 
British BECHUANALAND. Witkop (subfossil, Schultze). 
Taking into consideration the great range of variation to be found 
in South African fresh-water shells, it appears impossible to separate 
zuluensis, which was likened by its joint authors to natalensis, from 
the last-named species. 
522. IstDORA PARIBTALIS (Mousson). 
1887 Physa parietalis, Mouss., J. de C. xxxv. p. 298. pl. 12, £.8. DL’. 
19049 \5, , » von Mts., Die Kalahari, p. 756. N. 
1910 Isidora ue ,  Bttg., Abh. Senckenb. Naturf. Ges. 
Frankfurt, xxxii, p. 452. WN, 
