236 Annals of the South African Museum. 
TRANSVAAL. Ranjesfontein ; Potchefstroom (Connolly). 
Also recorded from Victoria Nyanza. 
497. PLANORBIS GIBBONSI, Nelson. [S.A.M.] 
1878 Planorbis gibbonsi, Nels., Quart. Journ. of Conch. i. p. 379. 
Blick tos, peice. 
» von Mts, D.-O.-Afr. p. 150. N. 
» Neuville & Anthony, Ann. Sci. nat. 
Paris, vill. p. 260. N. 
1897 +i 
1908 
Type in coll. Nelson. 
Hab, Carr Prninsuta. Black River, Maitland (Connolly). 
Described from Zanzibar, and known from Central Africa. 
None of the original specimens of Pl. gibbonst have been available 
for comparison, while the original description and figure do not appear 
to quite fit the single representative of this species (ex coll. von 
Martens) in the British Museum, or similar shells in my collection 
from South and Central Africa. I have, however, submitted a set of 
the latter to Mr. J. W.-Taylor, who kindly replied: ‘“ I have carefully 
examined the Planorbes you sent, and am of opinion that they do 
represent the Pl. gibbonst of Nelson. I find the lithographic artist 
made the shape of the mouth in the original figure more angular 
than I am sure it was. I was much interested in these shells when 
Gibbons sent them, and gave them considerable attention.” 
498. PLANORBIS HERMANNI, Bottger. 
1910 Planorbis (Coretus) hermanni, Bttg., Abh. Senckenb. Naturf. 
Ges. Frankfurt, xxxi. p. 452. pl. 28, f.18. DF. 
Type in Senckenberg Mus. Frankfurt. 
Hab, DAMARALAND. Okaputa Pan (several dead shells, Hermann). 
“Very like P. pferfferi, Krs.”’ (Bttg.). 
499. PLANORBIS LEUCOCHILUS, Melv. & Pons. 
1903 Planorbis leucochilus, M.& P., A.M.N.H. xii. p.607. pl.31, £.3. DF. 
Type in British Museum. 
Hab. Natau. Killarney Lake, Pietermaritzburg (Burnup). 
500. PLANORBIS NATALENSIS, Krauss. 
1848 Planorbis natalensis, Krs., Siidafr. Moll. p. 83. pl. 5, f£.9. DF. 
1877 = natalis, Krs., Sow., Conch. Icon. pl. 4, f. 32. DF. 
1883 , - natalensis, Krs., Cless., Conch. Cab. p. 109. pl. 17 
(1882), f. 3. DF. ; 
