1016 MALA.YSIAN LAND AND FRESHWATER MOLLUSC A, 



This is a common shell like the last, and is subject to similar 

 variations in colourings which divide into three principal forms. 

 Var. A : chestnut above, white below, divided at the periphery by 

 a broad white band ; umbilicus, chestnut brown. This variety is 

 figured by Chemn. (Helix, fig. 1174). Var. B: greyish above 

 -with a brownish median (Chemn. fig. 1175). Var. C: white with a 

 blackish-brown band. Regarded by some as quite distinct from 

 N. citrina. 



Moluccas, Malay Peninsula, &c. 



N. FULVIZONA, Mousson, in coll. ; von Martens, Ostas. Zool. 

 II. p. 201 = HpHx fulvizona, Pf r. Mon. Hel. V. p. 96. 



This is a most variable shell with regard to its colouring. Ten 

 different varieties are enumerated by Pfr., the type approaching 

 somewhat to Helix citrina, L. 



Celebes. 



N. PARCTPILA, von Martens, in Monat. Akademie Berlin, 18th 

 April, 1864, p. 264 ; (Xesta) Ostas. Zool. II. p. 192, pi. 9, fig. 1 = 

 Helix parcipila, Pfr. Mon. Hel. V. p. 119. 



Adenare Islands, Moluccas. 



N. IGNESCENS, Pfr. = Helix ignescens, Pfr. Proc. Zool. Soc. 1861, 

 p. 20, pi. 2, fig. \=Nanina ignescens, Wallace, Proc. Zool. Soc. 

 1865, p. 406 ; (Xesta J von Martens, Ostas. Zool. II. p. 192, pi. 9, 

 fig. 2 = Helix ignescens, Pfr. Mon. Hel. V. p. 98. 



Batchian Island, Moluccas. 



N. MONOZONALIS, Lamarck, = N. monozalis, Pfr. Nomen. Hel. 

 p. 40, No. 582 = Helix monozonalis, Lamarck, Hist. Nat. 1st edit. 

 IV. p. 66, Desh. edit. p. 29 =^ Helix unizonalis, Desh. Encycl. 

 Meth. pi. 462, fig. 6 = Helicella unizonalis, Per. pr. 241, Hist, 

 pi. 91, fig. 4 = Nanina monozonalis. Gray, Proc. Zool. Soc. 1834, 

 p. 59 = Zonites unizonalis, Swainson, Malac. p. 331 = Helix 

 monozonalis, Pfr. Mon. Hel. I. p. 72. 



Swainson regards this shell as a mere variety of JV. citrina. 



Amboyna. 



