248 Annals of the South African Museum. 
1856 Physa cyrtonota, Bgt., Rev. et Mag. Zool. viii. p. 238. pl. 15, 
fF... 250 Dee 
3 - = », Amén. malac.i.p.177. pl. 21,£.1,2. DF. 
1873 ,,  tropica, Krs., Sow., Conch. Icon. pl. 5, £.32. DF. 
1874 Isidora ,, » dick., Fauna N.-O.-Afr. p. 205. N. 
1880 Physa lirata, Crvn., P.Z.S. p. 617. pl. 57, f.10. DF. 
1885 ,,  tropica, Krs.,Cless., Conch. Cab. p.288.pl.41,f.8,11. D.P. 
1886 ,, cyrtonata, Bgt.,Cless., zbzd. p.323. pl.39 (1884), f.5. DP. 
craven, Ancey (=lirata, Crvn., 1880, nec Tristram, 
1863), Ancey, Le Naturaliste, viii. p. 358. 
1889 ,,  lirata, Crawf., Morel., J. de C. xxxvii. p.20. (Err. typ.) 
1897 Isidora tropica, Krs., von Mts., D.-O.-Afr., p. 140. D. 
1898 Physa cravent, Stur., S.A. Moll. p. 76. Hmend. Nom. 
1899 +s Ancey, M..é P., A.M.N.H. iv. p. 193. _N. 
1910 Isidora tropica, Krs., Bttg., Abh. Senckenb. Naturf. Ges. Frank- 
furt, xxxiil. p. 453. N. 
Type of ¢tropica in Stuttgart Museum; cyrtonota in Geneva 
Museum; lirata in British Museum. 
Hab. Transvaat. River Lepenula (tropica, Wahlberg). Mooi 
River (lirata, Craven). 
Natat. Examples recorded, but require verification. 
Carr or Goop Horr. Port Elizabeth (lirata, fide Morelet). 
Stellenbosch (Péringuey). Montagu; Black River, Maitland (Con- 
nolly). Olifant River (cyrtonota, Verreaux). 
DAMARALAND. Okaputa Pan (subfossil, Hermann). 
Jickeli remarks that cyrtonota “agrees perfectly with tropica.” I 
have not seen an authentic example of Bourguignat’s species, but 
judging from his description and figure, it certainly does so. The 
type set of lirata are slightly immature specimens of tropica, of 
which there is a fine co-type available for comparison in the British 
Museum. Krauss mentions that the young of tropica have a ribbed 
epidermis, the feature on which Craven founded his species. 
”? Le) 
525. IsIDORA VERREAUXI (Bourguignat). 
1856 Physa verreauxti, Bgt., Rev. et. Mag. Zool. viii. p. 237. pl. 15, 
fit, 42> Df, 
s ¥ , Amén, malac.i.p.176. pl. 21,f.3,4. DP’. 
1886 = ,, Cless., Conch. Cab. p. 317. pl. 39 (1884), 
io agai 8 J) ah 
Type—wubi ? 
Hab. Cave or Goop Horr. Olifant River; Knysna (Verreaux). 
