244 Annals of the South African Museum. 



517. ISIDOBA COMPTA, Melv. & Pons. [S.A.M.] 



1903 Isidora compta, M. & P., A.M.N.H. xii. p. 606. pi. 32, f. 14. D.F. 



Type in British Museum. 



Hab. TRANSVAAL. Boksburg (McBean, per Burnup). 



ORANGE FREE STATE. Kopjes ; Morgendal ; Valsch Eiver, Lind- 

 ley (Connolly). 



MASHONALAND. Enkeldoorn District (Miss Sharpe-Young). 



Near /. tropica (Krs.), from which it can be distinguished by the 

 curve of the outer lip, which may be called normal and regular in 

 tropica, but in compta is usually distinctly flattened and almost 

 incurved for a short way below the suture. 



518. ISIDORA CONTORTA (Michaud). 



1829 Pliysa contortus, Mich., Bull. Soc. Linn. Bordeaux, iii. p. 268. 



plate, f. 15, 16. D.F. 

 1831 ,, contorta, Mich., Complement Hist. Moll. Fr. p. 83. 



pi. 16, f. 21, 22. D.F. 

 1838 Desh., Hist. nat. An. s. Vert. viii. 



p. 403. D. 

 1841, 3 Kiist., Conch. Cab. (Limn.) p. 8. pi. 1, 



f. 9-11. D.F. 

 1864 Bgt., Mai. Algerie, ii. p. 171. pi. 10, 



f. 38-40. D.F. 

 1870 Blanf., Obs. Geol. and Zool. Abyss. 



p. 472. N. 



1874 Isidora ,, ,, Jick. ( = tropica, Krs., and cyrtonota, 



Bgt.), Fauna N.-O.-Afr. p. 203. pi. 3, f. 4. pi. 7, f. 14. D.B.F. 



Physa contorta, Mich., Sow., Conch. Iccn. pi. 11, f. 92. D.F. 



1886 Cless., Conch. Cab. p. 314. D.N. 



1908 Isidora ,, ,, ( = sericina, Jick.), Neuville & 



Anthony, Ann. Sci. nat. Paris, viii. pp. 274, 275. N.F. 

 Typeubi ? 



Hab. CAPE OP GOOD HOPE. Quarry near Fort England, 

 Grahamstown (Farquhar). 



A set of hardly mature shells from the above locality appeal- 

 inseparable from Michaud's variable species, which is widely 

 diffused through the South of Europe and North Africa, and 

 recorded from West Africa and the Euphrates. Jickeli (1874) was 

 very possibly right in placing tropica in the synonymy ; but I have 

 so far been unable to confirm his views, and as the last-named 

 species is, typically, a well-marked one in South Africa, with a 



