NAN IN A. 79 



N. NANINOIDES, Benson. PI. 22, fig. 37. 



Perforate, rather solid, closely distinctly striated above, ob- 

 soletely decussated by concentric lines, base smoother, distantly 

 striulate ; light orange-brown, or yellowish corneous, whitish 

 and more shining below ; whorls r>. Diam. 25, alt. 13 mill. 



Singapore, Chusan. 



The synon3 r my includes N. striata, Gray ; N. orientalis, Reeve 

 (not Gray), and N. Isabella, Hombr. and Jacq. 



N. CELEBENSIS, Pfr. PI. 22, fig. 38. 



Perforate, rather solid, closel}' rugosely striated above; cinna- 

 mon brown, base lighter and smoother, interior pearly white; 

 whorls 7. Diam. 2 7 "5, alt. 18 mill. Celebes. 



N. UMBILICARIA, Le Guillou. PI. 22, fig. 39. 



Perforate above, closely costulately striate, decussated by 

 slight spiral lines, smooth and shining below; light yellowish 

 corneous, with two approximating, equal, narrow peripheral 

 chestnut lines, the umbilical region stained with chestnut, and 

 sometimes with a sutural zone of the same color; whorls 6, the 

 last with angulated periphery. Diam. 33, alt. 17 mill. 



Sumatra, Bakata, Ban'Tca, Java. 



Very closely allied to X. Jauanica, Lam. Dr. von Martens 

 describes the following varieties : 



Yar. SUMATRANA, Martens. 



Larger, a little more depressed, light reddish brown, the per- 

 iphery white. 



Var. SUNDANA, Martens. 



Smaller, subelate, j-ellowish, with whitish periphery. 



Yar. VIRESCENS, Martens. 



Same form as Sundana, greenish corneous, periphery greenish 

 white (X. albicincta, Mouss., in Coll.). 



Yar. BANKANA, Martens. 



Smaller, elate, pallid (N. subjavanica, Mouss., in Coll.). 



N. DESGRAZII, Hombr. and Jacq. PI. 22, fig. 40. 



Perforate, regularly closely striate ; light yellowish brown, 

 with two peripheral chestnut'lines, umbilical region stained with 

 chestnut; whorls 6, periphery rounded. Diam. 29, alt. 16 mill. 



Sumatra. 

 Is possibly a variety of N. umbilicaria, Le Guillou. 



