NIOTHA. ,)1 



The ribs are few, rather broadly rounded, color variable. N. 

 proximo,, and N. striata (fig. 271), of C. B. Ad., N. rufocincta, 

 A. Ad. (fig. 272), N. crebristriata, Carpenter (_unfigured), and 

 N. Lecadrei, Folin (fig. 275), are synonyms. 



N. sixrsiGERA, A. Ad. PL 15, figs. 274, 276-278. 



Whitish, stained or filleted with red-brown ; ribs slightly 

 granulated at the sutures, lips varicose,' sinuated at the lower 

 part. Length, -5 inch. 



Philippines, Mauritius. 



The lip-sinus is not, probably, distinctive. G. and H. Nevill 

 figure N variety cernica (fig. 276) from Mauritius. N.frdudulenta, 

 Ma IT. (fig. 277), from Philippines, and N. cribrnria, Man 1 , (fig. 

 278% habitat unknown, are, judging from figures and descrip- 

 tions, at least very closely related. 



Siiljr mis Jiiotha, H. ami A. Adams. 



The difference between this group and Alectrion, is very slight, 

 yet its retention will possibly facilitate the classification of the 

 species; it includes those shells having a reticulated or cancel- 

 lated surface in consequence of the longitudinal and revolving 

 sculpture being about equally, prominent, whereas in Alectrion 

 either the whorls are smooth or the longitudinal ribs are much 

 more prominent than the revolving stria?. In both, the inner lip- 

 callus is spread over the body-whorl, and the outer lip is with- 

 out external varix. 



N. ALBESCENS, Bunker. PL 16, figs. 279-283. 



White or yellowish, sometimes with faintly marked ash- 

 colored bands, which are chocolate-colored within the white 

 aperture ; first whorls usually dark ash-color. 

 Length, 15-20 mill. 



Japan, Philippines, Polynesia, Australia, 



Mozambique, Andaman Isles. 



The typical form of this species is easily recognized by its 

 faint bands and dark apex ; of this type is N. bicolor, Hombr. et 

 Jacq. (fig. 280). There is a gradual variation from this to the 

 next species, so that it is difficult to decide where the one should 

 end and the other commence ; among these varieties are N. 

 fen.estrata, Marr. (fig. 281). a somewhat more ovate form, the 



