50 NEKIÏINA (CLITHON) SUBOCELLATA. 



very small, eroded, probably 2 whorls and a half, which 

 form a flat cone. Suture not deep , covered by the mar- 

 gin of the next volution. Aperture moderate, obliquely 

 semi-elliptical; upper margin curved, outer and lower mar- 

 gin rounded , interior of the aperture bluish , the callosity 

 near the muscular scar , moderately long , low ; the columel- 

 lar plain callous above , with a narrow layer of enamel , 

 which has the aspect of shagreen , becomes thicker towards 

 the free edge and shows there a small sinuosity with 4 to 

 6 denticles, besides a few secondary ones; the sinuosity is 

 bordered above by a much greater dentition and still higher 

 are a few crenulations which form grooves to behind. 



Operculum semilunar, on the outside with very small 

 granulations, yellowish, grey towards the outer margin and 

 the nucleus, with a reddish rim, inside similarly coloured; 

 of the two apophyses the rib is broad at the top , flattened , 

 pale yellow; the other apophyse is orange-yellow, an in- 

 termediate wall of nearly the same height connects it to 

 the rib. 



Alt. 14, greatest diameter 13 mill. 



Three specimens from Besoekie , Java , in the river at 

 Proeger; two from the same locality and one from Kema 

 (Celebes) in my own collection , all found by Dr. Semmelink. 



This species has some affinities to JV. brevispina Lam., 

 but it is smaller, more smooth than brevispina commonly 

 is, and the colour is quite distinct, none of the specimens 

 shows any trace of the black band near the suture , that 

 seldom fails in A^. brevispina. The colouring reminds one 

 the N. rarispina of Mousson , but that species is smaller 

 and , according to the figures and description , of a much 

 more oblique shape. 



Rhoon near Rotterdam, December 1884, 



Motes from the Ley<len Museum, "Vol. "VII. 



