NTOTIIA. 51 



The ribs are few. vat her broadly rounded, color variable. A. 

 proximo, and A", utriata (fig. 271), of C.. B. Ad., A T . rufocincfo, 

 A. Ad. (fig. -272), N. vrebrintriata, Carpenter (iinfigured), :md 

 N. Lwndrci. Fulin (fig. 275). :iro synonyms. 



X. siNfsK.HKA. A. Ad. PI. 15. figs. 274, 276-278. 



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

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



part. Length, '5 inch. 



Philippines, Mauritius. 



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

 figure a variety cenrica (fig. 27<>) from Mauritius. N.fraudulenta, 

 Ma rr. (fig. 277 :, from Philippines, and N. rribrn-ria, Ma IT. (fig. 

 27S ', habitat unknown, are. judging from figures and descrip- 

 tions, at least very closely related. 



Siil>i inns Kiotha. 11. and A. Adams. 



The difference between this group and Aleclrion. is very slight, 

 yet its retention will possibly facilitate the classification of the 

 specie's ; 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 Alecfrion 

 either the whorls are smooth or the longitudinal ribs are much 

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

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

 out external varix. 



N. ALBESCENS, D unker. PI. 10, figs. 279-28o. 



White or yellowish, sometimes with faintly marked ash- 

 colored 1 lands, which are chocolate-colored within the white 

 aperture : first whorls usually dark ash-color. 

 Length. 15-20 mill. 



Japan, Philippines* Polynesia^ Au&trali&j 



Mozambique, Andaman hlcx. 



The typical form of this species is easily recognized by its 

 faint bands and dark apex; of this type is X. hu-olor, 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 A 7 . 

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



