NANTNA. 125 



ST. FUTUNAENSTS, Mousson. PL 41, fig. 85. 



Imperforate, thin, pellucid, very shining; brownish corneous ; 

 whorls 5J, suture submargined, periphery rounded ; columella 

 slit up, forming a long tooth, curved downward and outward 



below. Diam. 4, alt. 3'2 mill. 



Futuna, Ins. Tonga. 

 N". CULTRATA, Gould. PL 41, figs. 48-50. 



Imperforate, thin, shining; brownish green ; whorls 5, suture 

 margined, periphery angulated ; columella oblique, callous, 

 white, tooth-like below. Diam. 6, alt. 2-5 mill. 



7ns. Taheiti, Eimeo. 

 S". FIRMOSTYLA, Mousson. PL 41, fig. 62. 



Covered perforate, smooth ; shining ; corneous ; whorls 5J, 

 suture submargined, periphery rounded ; columella white, den- 

 ;ately thickened. Diam. 3, alt. 2 mill. 



Ins. Samoa, Uvea. 



N T . TAVIUNIENSIS, Liardet. PL 41, figs. 54, 55. 



Minutely perforate, smooth, highly polished ; yellowish corn- 

 sous ; whorls 5 ; columella white, with a callous curved tooth 



near the base. 



Is. of Taviuni and Gamia, Fiji Group. 



"Animal very active. I observed it on one occasion, when 

 nterrupted in progression, lift its tail high and shake it vigor- 

 Dusly." 



* 5)c The following species included in Microcystina by Austen, 

 etc., are conchologically only distantly related, wanting 

 the tooth-like callus on the columella ; they might as well 

 have been placed in Macrochlamys. 



N". MOERCHIANA, Austen. PL 41, fig. 75. 



Polished, microscopically spirally striated, reddish brown ; 

 whorls 5 ; columella solid and quite perpendicular at the junc- 

 ion with the body-whorl. Diam. 8'2, alt. axis 3'8 mill. 



Kondul Isl., Bay of Bengal. 



N. WARNEFORDI, Nevill. PL 42, fig. 89. 



Narrowly perforate, very finely microscopically spirally 

 striate, glossy; umber-brown; whorls nearly 5; columellar 

 margin oblique, very slightly reflected, solid and angulate. 



Diam. 4*6, alt. axis 2 mill. Andaman Is. 



