30 MARINH SHELLS OF SOUTH ARICA. 
utrinque fortioribus; lateribus convexiusculis; apertura 
mediocriter lata, postice producta, columella rectiuscula. 
Hab. Durban. 
Long. 8, lat. 4 millim. 
A very fragile shell, very finely striated. In form it 
somewhat resembles H. bvevis, (Quoy and Gaim.), but it is 
rather more attenuated at the extremities, and consequently 
less cylindrical. 
NOTE. 
ZIZIPHINUS MULTILIRATUS, Sow. (P.ZS., 1875, p. 127, 
pl. 24, f. 10), is, I] think, not S. African. The locality given 
‘* Cape of Good Hope,” being a mistake. 
