NTOTIIA. •>! 



The ribs Jire few, ratlu'r broadly rounded, color variable. N. 

 j>ro.rima, and iV. striata (tig. 271), of C. B. Ad., N. rufoeincta, 

 A. Ad. (<i<r. 272), N. crebrisfriata, Carpenter (unligured), and 

 A^. Jjt'cadrei, Folin (fig. 275), are synonyms. 



N. siNusKiKRA, A. Ad. PI. 15, (igs. 274, 27G-27H. 



. Whitish, stained or filleted with red-brown ; ril>s slightly 



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



part. Length, -5 inch. 



Philippines, MauritiUH. 



The lip-sinus is not, probably, distinctive. G. and 11. Nevill 

 figure a variety cernica (lig. 27(j) from Mauritius. N.fraiidnlenta, 

 Marr. (lig. 277), from Philippines, and N. vrihraria. Marr. (fig. 

 278 >, habitat unknown, are, judging from figures and dcscrij»- 

 tions, at least very closely related. 



Sul)i; mis Kiotha. II. iiiid A. Adams. 



The difference betw^een 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 i"ibs are much 

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

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

 out external A'arix. 



N. ALBESCENS, Duuker. PI. IG, figs. 279-283. 



White or yellowish, sometimes with faintly marked ash- 

 colored bands, which are chocolate-colored within the white 

 aperture ; first whoi'ls usually dark ash-color. 

 Length, 15-20 mill. 



Japan, Philippiucx, Polynesia, Australia, 



Mozambique, Andaman Isles. 



The typical form of this species is easih* 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 A'arieties are N. 

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



