136 PBOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



breadth, the upper whorls sculptured with transverse and distant, 

 spiral, scratch-like striae, the lower obliquely, transversely costulate, 

 the costulae being much more marked in the sub-sutural region, 

 except on the last whorl, where they become finer, more closely 

 set and well marked throughout its whole length ; suture 

 impressed; umbilicus moderately narrow ; columella-margin obliquely 

 descending ; labrum white, narrowly expanded, the converging 

 margins joined by a thickish and well-defined parietal callus ; 

 aperture obliquely sub-triangular, armed with a projecting, 

 parietal, lamella-like tooth, two denticles on the inner margin of 

 the columella lip, the lower in each case being the stronger. Alt. 

 625, diam. maj. 3mm. Aperture: alt. 1-75, diam. 1 mm. 



Hah. — Onoha or Lokar, Opobo District, S. Nigeria (Lieut. L. 

 Eees, R.A.). 



