NANINA. 19 



N. MINDAIENSIS, Bock. PL 2, fig. 29. 



Narrowly umbilicated, semitransparent ; reddish brown, with 

 a white-tipped lip ; whorls 6, with finely granulated radiating 

 striae, the last whorl acutely keeled. Diam. 30, alt. axis 13 mill. 



Mindai, Borneo. 



Darker colored than the next species, with one whorl less, 

 more convex, not so sharply keeled, umbilicus narrower, sculp- 

 ture coarser. 

 N. MARSEVEENI, Bock. PI. 3, fig. 32. 



Umbilicated, thick ; light-brownish horn-color, somewhat pale 

 around the umbilicus ; whorls 7, with feebly granulated, obliquely 

 arcuate growth-lines, last whorl with a very acute, pale per- 

 ipheral keel. Diam. 33, alt. axis 14 mill. Sumatra. 



N. SACCATA, Pfr. PL 3, fig. 33. 



Perforate, very thin, obliquely striulate, decussated by minute, 

 crowded spiral lines, scarcely shining, pellucid, reddish corneous, 

 suture impressed, narrowly margined ; whorls 4j, rapidly en- 

 larging, the last not descending, narrowly carinated, obliquely 

 rugose above the carina, base convex, saccate in front. 



Diam. 28, alt. 16 mill. India. 



N. REGALIS, Benson. PL 2, figs. 30, 31. 



Perforate, closely undulately striate and granulate, fasciated 



or unicolored ; whorls 6, the last not descending, shining below, 



very minutely decussated, the circular striae obsolete towards 



the umbilicus. Diam., 27 mill. Borneo. 



Var. UNICOLOR. Purple-brown. 



Var. VITTATA, Ads. and Reeve. Undulating striae less conspicu- 

 ous, lighter colored, with four reddish bands, carina and 

 umbilical area yellowish. 



Var. MAJOR. More depressed, reddish brown, without bands, 

 umbilical area white. Diam. 34 mill. 



N. JANUS, Chemn. PL 3, figs. 34, 36. 



Perforate, thin, diaphanous, closely obliquely costulate-striate ; 

 brownish above, reddish chestnut below and somewhat shining; 

 whorls 7, the last more or less carinate. Diam. 36 mill. 



Mt. Ophir, Malacca. 



It is N. Mackensiana, Soul. (fig. 316). 



