190 Annals of the South African Museum. 



1897 Limicolaria (LivinJiacia) nilotica, Pfr., von Mts., D.-O.-Afr. 



pp. 94-98. D.F. Varr. and Synonymy. 



1898 Livinhacia arnoldi, Stur., S.A. Moll. p. 59. pi. 2, f. 41. D.F. 

 1904 Burtoa arnoldi, Stur., Pilsb., Man. of Conch, xvi. p. 307. pi. 26, 



f. 14. D.F. 



nilotica, Pfr., Pilsb., ibid. p. 300. pi. 26, f. 15, 16. pi. 27, 

 f. 5, 6. pi. 29, f. 7, 8. pi. 30, f. 18. pi. 35, f. 22, 23. D.F. 



1906 ,, nilotica, Pfr., Eeynell, Proc. Mai. Soc. vii. p. 197. pi. 17, 



f. 1-3. A.R. 



1907 Burtoa nilotica, Pfr. (arnoldi, Stur.), Melv. & Standen, Man- 



chester Memoirs, li, 4. p. 11. N. 



Type of nilotica in British Museum ; arnoldi in Naturh. Hofmus. 

 Vienna. 



Hab. MATEBILILAND. Near the Amanze Inyama River (arnoldi, 

 Penther). 



RHODESIA. Salisbury (Oakley). Victoria Falls (Soper). Insiza 

 (French). 



A most variable form, originally described from The Source of the 

 White Nile (Petherick), and occurring in many parts of Eastern 

 Africa. Crosse (1889) places Bui. giraiidi, Bgt., in the synonymy, 

 to which von Martens (1897) adds jouberti, sebasmia, bridouxiana, 

 and laviyeriana, Bgfc. The last-named author also identifies pethericki, 

 Bgt., with var. schweinfurthi, von Mts., and describes varr. cmini, 

 crassa, obliqua, and oblong a. Pilsbry (1904) brings in as further 

 varieties reymondi, Bgt., and grandidieri, Pilsb. ( = Limicolaria 

 bourguignati, Grandidier). 



GENUS ACHATINA, Lamarck, 1799. 



(Mem. Soc. Hist. Nat. Paris, p. 75.) 



( Onccea, Gistel, 1850; Urcens (Klein), Jousseautne, 1884, and 

 Parachatina, Serpcea, and Pintoa, Bourguignat, 1889.) 



Type of Genus, A. achatina (Lin.). 



Pilsbry (1904) places most of the South African forms previously 

 attributed to this Genus in Cochlitoma, Fer. (Tabl. Syst. Moll. pt. 3, 

 1821, pp. 28, 52 (or 24, 48), Type A. zebra, Chem.), and Kobelt (1909) 

 follows his example. Apparently there are no anatomical grounds 

 for the subdivision, which rests on a very fragile conchological basis. 

 As many of the leading British and South African authorities are 

 averse to the change, I prefer to retain the older classification. 



