164 Annals of the South African Museum. 
(i) Pachnodus, Albers, 1860 (Die Helic. p. 230, Type, in error, 
velutina, Pfr.; emend., Bgt., 1889, Moll. de l’Afr. équat. p. 64, Type 
spadicea, Mke.). 
Bourguignat’s rejection of velutina as type of Pachnodus seems 
perfectly sound. If spadicea is not acceptable, a new name is 
necessary for the group, which comprises— 
arenicola, Bs.; carinifera, M. & P.; drakensbergensis, Smith ; 
mcbeaniana, Bnp.; natalensis, Krs. and spadicea, Mke. 
(=vitellina, Pfr.). 
(ii) Conulinus, von Martens, 1895 (Nachr. d. Deutsch. Mal. Ges. 
p. 180, Type, conulus, Rve.). 
conulus, Rve.; metuloides, Smith; transvaalensis, M. & P., 
and probably burnuwpi, dimera, and maritzburgensis, M. & P., 
and meridionalis, Pir. 
(ili) Xerocerastus, Kob. & Mlldff., 1902 (Conch. Cab. p. 1021, 
Type, damarensis, Ad.). 
(= Hburnea, Mousson, 1887 (J. de C. p. 295), nee Hburna, Lam., 
1801, nec Hburnea, Flem., 1828). 
burchellt, Gray ; damarensis, Ad. ; hottentota, Gray (= pygmea, 
Ad.); layardi, M. & P.; opposita, Mouss.; psammophila, 
schultzei, and subteres, Bttg., and zuluensis, M. & P. 
(iv) Rhachisellus, Bourguignat, 1889 (Moll. de l’Afr. équat. p. 68, 
as Rachisellus. Type punctata, Anton.) 
Thiele (Deutsch. Zent.-afr.-Exp., 1911, p. 201) shows that punctata 
is not acceptable as type of Rhachis, Albers, but is rightly placed in 
Bhachisellus. Although possibly not belonging to the same Sub- 
genus, the following shells fall, roughly, into the same group :— 
dubiosa, Stur.; melanacme, mozambicensis, and petersi, Pfr. ; 
punctata, Ant. (=jeyuna, M. & P.); spilogramma and _sticta, 
von Mts. 
Thiele (/.c.) has, on account of radular peculiarities, proposed to 
include melanacme and mozambicensis in a new Sub-genus Rhachi- 
dina, the type of which is the West African twmefacta (Rve.). 
(v) Ena pentheri (Stur.). 
(vi) Group of EL. bowkeri (Sow.). 
bowkert, Sow., and nuptialis, M. & P. 
(vii) Ena bowvini (Morel.) (= movenensis, Stur.). 
In the following pages the species are arranged in alphabetical 
order. 
Norre.—LHulimoides, Gray, and nanuibicus, Bttg., were described 
as Hnide, but apparently belong to Zootecus, Westerl., a Genus of 
Stenogyrime. 
