110 NANINA. 



Var. SCHISTOSTELIS, Benson. PL 37, figs. 89-90. 



Umbilicated, thin, irregularly striulate, ver} 7 closely spirally 

 striate above, translucent, light corneous, shining ; whorls 4^-5^, 

 suture margined. Diam. 11-16, axis 6*5-8'5 mill. 



N. FORABILIS, Benson. PI. 37, figs. 91, 92. 



Umbilicated, thin, corneous, shining, with thread-like very 

 close incremental striae, and faint or obsolete spiral lines on the 

 upper whorls ; whorls 5-5^, suture scarcely channeled. 



Diam. 8*8, alt. 5*8 mill. 



Damotha near Moulmein, Burmah. 



Perhaps this and the next species are only varieties of N. 

 Calias. 



N. CONJUNGENS, Stoliczka. Pi. 37, figs. 93, 94. 



Moderately Umbilicated, thin, semipellucid, with minute incre- 

 mental and spiral striae, sometimes obsolete ; corneous, nearly 

 Ii3 r aline in young specimens; whorls 5-5 J, suture scarcely chan- 

 neled, umbilical carina obtuse, indistinct, sometimes nearly 



obsolete. Diam. 1T6, alt. 7'2 mill. 



Near Moulmein, Burmah. 



Section EURYPUS, Semper, 1870. 



N. CASCA, Gould. PL 37, figs. 96-98. 



Narrowly perforate, rather solid, smooth, shining, brownish 

 flesh-color, suture chestnut margined ; whorls 5^, the last 



obsoletely angulated. Diam. 18, alt. 10 mill. 



Viti Islands. 



Helix calva, Gould, non Lowe, and H. Vitiensis, Pfr., are 

 synonyms. 



N. SIMILIS, Semper. PL 37, fig. 99. 



Perforate, solid, striulate ; brownish corneous, without sutural 

 band, scarcely shining ; whorls 5^, the last very obsoletely angu- 

 lated. Diam. 17, alt. 10'25 mill. 



Viti Islands. 



It has been confused with N. casca, Gould, from which it is 

 distinguished b} 7 the want of the brown sutural band, the less 

 shining surface, the more globose form, and scarcely apparent 

 angulation. I think it merely a variety of N. casca. 



