66 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, Jmpervia 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. JinNEA ALBERSI (Pfeiffer). [S.A.M.] 
1854 Pupa albersi, Pfr., P.Z.S. p. 295. D. 
1855 Hnnea albersi, Pir., Mal. Blatt. ii. p. 61. D. 
a - » Novit. Conch. i. p. 38. pl. 19, f. 15-17. DF. 
1859 A 3, Mon, Hel.1v; p. 338-9 2D: 
1885 P »  Lryon, Man, of Conch. p. oi, ploy hese, 
64, DF. 
1903 - ph ML. GP.) Al NeEt svat p. 96; ei oE 
1904 Kob., Conch. Cab. p. 182. pl. 23,f. 7-9. DP, 
Type in British Museum. 
Hab. Nata. Port Natal (Strangier, fide Pfeiffer 1859). Port 
Shepstone, both sides of the River Umzimkulu (Burnup), 
9. ENNEA ALIcIa, Mely. & Pons. 
1907 Hinnea alicia, M. & P., A.M.N.H. xix. p..95. pl. 6, f. 1. DF. 
Type in British Museum. 
Hab. Gonvutand. Makowe (Burnup). Dukuduku Forest (Toppin). 
This may possibly be conspecific with H. dedalea, M. and P. 
Size is the chief distinguishing characteristic, and intermediate 
grades exist. 
10. Ennea ApPerostoma, Melv. & Pons. 
1892 EHnneaaperostoma,M.&P.,A.M.N.H. ix. p. 93. pl. 6,f.10. DF. 
1904 & », Kob.,Conch.Cab.p.219.pl.27,£10. DF’. 
Type in British Museum. 
Hab. Natvau (Layard). 
var. LISSOPHANES, Mely. & Pons. 
1892 EHnnea aperostoma var. lissophanes, M. & P., A.M.N.H. ix. 
p93. NV, 
Type in British Museum. 
Hab. Narvau (Layard). 
