Reference List of South African Non-marine Mollusca. 133 
Type in Senckenberg Museum, Frankfurt. 
Hab. Damarauannd. Huleb, S. of Usakos (Rintelen). 
Genus TRACHYCYSTIS, Pilsbry, 1893. 
(Man. of Conch. viii. p. 136, and ix. p. 37.) 
(= Pella, Albers, 1860 (pars), nec Stephens, in Coleoptera, 1835.) 
Type of Genus, TJ. bisculpta (Bs.). 
During recent years this Genus has been a convenient receptacle 
for a large number of small South African helicoids, whose soft parts 
are mostly unknown, and whose conchological characters do not 
admit of their inclusion in other South African Genera. It has long 
been obvious that, as more becomes known of the animals, the 
Genus will have to undergo considerable revision. The fact, too, of 
bisculpta standing as the type will enormously restrict Trachycystis 
S.S., aS its animal is a very peculiar one, to which only charybdis, 
and probably tollini, vorticialis, and hartvigiana are near akin. 
227. TRACHYCYSTIS ACTINOTRICHA (Melvy. & Pons.). [S.A.M.] 
1892 Helix (Pella) actinotricha, M. & P., A.M.N.H. x. p. 238. pl. 13, 
Evo OLE 
1893 Phasis (Trachycystis) actinotricha, M. & P., Pilsb., Man. of 
Conch. viii. p. 143. pl. 35, f.14. DP. 
Type in British Museum. 
Hab. Narvau. Pietermaritzburg; Karkloof; Nottingham Road 
(Burnup). 
228. TRACHYCYSTIS NEA (Krauss). 
1848 Helix enea, Krs., Siidafr. Moll. p. 75. pl. 4, f.18. DF. 
%s a », Pfr., Zeitschr. f. Malak. p. 92. D. 
1853 Ks oe eo lon, Hel..diis ps 685 1) 
1854 - », Rve., Conch. Icon. pl. 189, f. 1320. DF. 
1887 Helix (Pella) enea, Krs., Tryon, Man. of Conch. iii. p. 105. 
pl. 20;f. 7h. Die. 
Type in Stuttgart Museum. 
Hab. Navau (Wahlberg). 
229. TRACHYCYSsTIS ALCOCKI, Melv. & Pons. [S.A.M.] 
1895 Helia (Trachycystis) alcocki, M. & P., A.M.N.H. xv. p. 164. 
pl. 13, f 2a DP. 
