G6 Annals of the South African Museum. 



It appears inadvisable to regard impervia as other than a well- 

 marked variety of adamsiana, being a stouter form with magnified 

 dentition. Impervia is found generally along the coast-belt of Natal, 

 with a very small sprinkling of the narrower form. At Pine Town 

 it is difficult to differentiate the two ; at Botha's Hill they are 

 enigmatical ; while on reaching Pietermaritzburg and the surround- 

 ing district only the narrower form is found. 



8. ENNEA ALBEBSI (Pfeiffer). [S.A.M.] 



1854 Pupa albersi, Pfr., P.Z.S. p. 295. D. 



1855 Ennea albersi, Pfr., Mai. Bliitt. ii. p. 61. D. 



Novit. Conch, i. p. 38. pi. 10, f. 15-17. D.F. 

 1859 Mon. Hel. iv. p. 338. D. 



1885 Tryon, Man. of Conch, i. p. 97. pi. 19, f. 83, 



84. D.F. 



1903 ,, M. & P., A.M.N.H. vii. p. 596. N.F. 



1904 Kob., Conch. Cab. p. 182.pl. 23, f. 7-9. D.F. 

 Type in British Museum. 



Hal. NATAL. Port Natal (Strangier, fide Pfeiffer 1859). Port 

 Shepstone, both sides of the Eiver Urnzimkulu (Burnup). 



9. ENNEA ALICIA, Melv. & Pons. 



1907 Ennca alicia, M. & P., A.M.N.H. xix. p. 95. pi. 6, f. 1. D.F. 



Type in British Museum. 



Hob. ZULULAND. Makowe (Burnup). Dukuduku Forest (Toppin). 



This may possibly be conspecific with E. dcedalea, M. and P. 

 Size is the chief distinguishing characteristic, and intermediate 

 grades exist. 



10. ENNEA APEROSTOMA, Melv. & Pons. 



1892 EnneaaperostomaM- &P-, A.M.N.H. ix. p. 93. pi. 6, f. 10. D.F. 

 1904 Kob.,Conch.Cab.p.219.pl.27,f.lO.>.^. 



Type in British Museum. 



Hab. NATAL (Layard). 



var. LISSOPHANES, Melv. & Pons. 



1892 Ennea aperostoma var. lissophanes, M. & P., A.M.N.H. ix. 



p. 93. N. 



Type in British Museum. 

 Hab. NATAL (Layard). 



