34 ZEUXIS. 



N. FOVEOLATA, Duiiker. PI. 10. iig. 111. 



Ash-colored; longitudinally finely ribbed, interstices cancel- 

 lated. Length, '7 inch. 



Hab. unknown . 



The figure is rather wider than the usual form of N. leptospira, 

 and shows a narrow, defined columella-callus ; nevertheless. I 

 strongly suspect that this is only an immature form of that 

 species. 



N. PLANICOSTATA, A. Adams. PI. 10, fig. 112. 



Ash-colored, closely and finely flat-ribbed, ribs sometimes 

 obsolete on the body whorl. Length, 20 mill. 



Payta, Peru; under stones at low water. Cuming. 



N. SPARTA, Marratt, PL 10, fig. 113. 



Light ash-color, fasciate with fulvous, purplish within. 



Length, *5 inch. 



W. Coast of So. Americ.fi. 

 I am not acquainted with this species. 



X. GAUDIOSA, Hinds. PI. 10. figs. 114-120; PL 11. figs. 121-124. 

 126-132. 



Spire usually acuminate, ribbed, sutures oivuulate or smooth. 

 body whorl generally smooth. Whitish, yellow. rufou>. choco- 

 late, with frequently distant, narrow red revolving lines and 

 irregular broad bands; maculate or closely punctate with 

 darker markings; sometimes unicolored. The form varies from 

 elongated to broad ovate, frequently constricted at the upper 

 part of each whorl. Length, '75-1 inch. 



Straits of Malacca, Philippines, Polynesia, Sandwicli Islam! *, 



Guinea, Coast, W. Afri<'. 



A solid, smooth, usually gaudily painted species, varying very 

 much in form and coloration. A large number of these variations 

 have received specific names, but 1 do not find in any of them 

 really distinctive characters. X. sr/Y^/<7, A. Ad. (fig. llfi), and 

 N. semisulcata, Dunker (fig. 117). have the typical coloration, 

 and the latter possesses the distant red revolving lines, which 

 so frequently form the groundwork of the ornamentation. In 

 N. zonalis, A. Ad. (fig. 1.18), the three brown bands which are 

 obscurely marked in N. sertula, become well colored. Another 



