NANINA. 123 



C. Umbilicated. 

 y. EURYOMPHALA, Bourg. PL 41, fig. 79. 



Umbilicated, smooth, thin, pellucid, shining, very lightly 

 striate ; corneous; whorls 5^, suture submargined. 



Diam. 6, alt. 3 mill. Abyssinia. 



N. PAUXILLUS, Gould. PL 41, figs. 51-53. 



Umbilicated, thin, costulately striated above; greenish hya- 

 ine ; whorls 4. Diam. 4-5, alt. 2 mill. 



Sandwich Islands. 



It is N. pusillus, Gould, not Lowe. 



N. PERFORATA, Desh. PL 41, figs. 83, 84. 



Umbilicated, fragile, pellucid, very minutely closely, irregu- 

 arly striated above, smooth below ; yellowish corneous ; whorls 

 J-5. Diam. 6, alt. 3'5 mill. 



Pekin. 

 '. MOLLENDORFFI, Reinhardt. PL 41, figs. 56-58. 



Umbilicated, polished, lightly striulate, decussated by very 

 slight spiral striae ; fulvous ; whorls 5i, suture narrowly mar- 

 gined. Diam. 10, alt. 5*5 mill. 



Pekin. 

 N. REJECTA, Pfr. PL 41, figs. 44, 63-65, 66-68. 



Narrowly umbilicated, thin, striulate, shining; brownish- 

 corneous, a little paler around the umbilicus; whorls nearly 5, 

 uiture submargined. Diam. 12, alt. 5 mill. 



Northern and Central China. 



N. mamillaris, Heude (figs. 66-68), is a synonym. 



N. PLANATA, Heude. PL 41, figs. 72-74. 



Umbilicated, smooth, polished ; light amber-colored ; whorls 

 I, the last one rapidly enlarging. Diam. 10, alt. 3'5 mill. 



Hounan, China. 



Un figured Species of Microcystis. 



$. PUNCTIFERA, Garrett. Rurutu Isl. 



N. SORORIA, Cox. Ovalau, Fiji Is. 



N. PATESCENS, Cox. Norfolk Island. 



N. CATLETTI, Brazier. Lord Howe's Isl. 



N". KERMANDECI, Pfr. Sunday 7s/., Kermandec Group. 



