PHRONTIS. 41 



latter being unfigured and undescribed. N. filbipttnctata, Reeve 

 (fig'. 173), said to have faint white-dotted bands, but which are 

 not shown by the figure, can scarcely be different. 



X. TIARULA, Kiener. PI. 12, figs. If 4-1 78. 



Ribs few, rounded, prominent ; whorls broadly shouldered 

 and frequently tuberculated on the shoulder. White, with a 

 single central, or several interrupted, narrow, brown bands. 



Length, ,">-('> inch. 



Solomon'' x Is , Philippines ^ f Madagascar, Kiener. 



This is a more quadrate, solid, smaller form than the pre- 

 ceding. It, as well as some of its synonyms, has been referred 

 to N. tegitla. Reeve, by such experienced students as Pease, 

 Carpenter, Mai-rat: I think, however, that the form and colora- 

 tion and difference of habitat, will justify a separation. I add 

 to Kiener's figure (tig. 174) one by Reeve, in which the ribs are 

 obsolete (fig. 175). N. rot'oni'la, A. Ad. (fig. 170), N. delicata, 

 A. Ad. (fig. 177), are synonyms. .V. trtHodosa, E. A. Smith 

 (fig. 178), from Solomon's Is., is probably a variety of this 

 species, although it 1ms partly the features of X. x>//>x/no.sY7. 

 Lam. 



X. CTXCTELLA, Gould. PI. 13, figs. 180-182. 



Shoulder rounded, ribs narrow, strongly laticed by revolving- 

 lines. White, with sometimes a narrow median brown bund. 



Length, '45-*(J inch. 



Philippine*, Central Polynesia. 



N. clathrattiltt, A. Ad. (fig. 182 \ is synonymous. X. cinctalla, 

 A. Ad. (fig. 181), from St. Helena, is very close, if not identical. 



X. NIGRA, Hombr. et Jacq. PI. 13. figs. 183-187. 



Dark chocolate-color within and without, with usually a light 



band. Length. -v-'ifa inch. 



Philippines. 



With this I unite A. lirata. Marrat, which "l figure from an 

 author's type dig. 184 , N. 7Wm//fW/?, Issel (tig. 185), in 

 which the ribs, especially round the upper part of the body 

 whorl, are more or less nodulous. JY. xcalarina, Marrat (fig. 180). 

 i am inclined to believe that A 7 . Novx-Zealanditt', Reeve (fig. 

 187), is merely a variety. 

 U 



