1 I IIEBHA. 





dinated lo (lie longitudinal ribs. Ash-color to chirk chocolate, 

 most I v light banded between the spiral rows of tubercles. 



Length. M5--T inch. 



hnli,in Ocean, Philippine*, J< r ew Zealand, Central Polynesia. 

 X. ribi'.r. Reeve. not Say ( lig. 200), is an elongated. immature 

 shell of this species: to which 1 refer also. A', {jeniciilala. A. 

 44. (fig. 210). and N, *i*t.i' t ,i,lr.u, <i. and II. Nevill (fig. 

 A', wtlijta, Marrat i lig. 212 .is described as passing into A'. * 

 on the one hand and A". rnrHratd on tlie other. 



\. MI KK'ATA. (Juoy and Uaimard. PI. 14. fii>s. 21 1-21S. 



Whitish or yellowish, with narrow Itands or blotches of chest- 



nut or chocolate. 



Indian Ocean, Madagascar, New Ireland, Polynesia. 

 Mr. Marrat considers this a variety of A'. xitbKjtuman. Lam., 

 and he is probably correct yet the less developed shoulder, 

 more swollen periphery, more numerous, smaller and decidedly 

 prickly tubercles, as well as lighter color, constitute characters 

 deserving of recognition, I think. With it are to be united A*. 

 hurrida, Dunker (fig. 21(>), A", (inun'ri. Reeve (fig. 217), and A". 

 curta, Gould dig. 218). 



N. GiUNKKi. Dunker. PI. 14, tigs. 2MI-222. 



White or yellowish, sometimes obscurely banded or spotted. 



Length, <if)--X inch. 



Ph i 



Distinguished by its regular, close sculpture of bead-like 

 tubercles, forming both longitudinal and revolving series. The 

 synonyms are A', hixpirta, A. Ad. (fig. 220). A'. MW^f/, Petit 

 (fig. 221). said to' come from West Coast of Africa (doubtful), 

 and A', arinn^t. (Jonld (fig. 222). 



N. miiNATA. A. Ad. PI. 14. ligs. 22:5. 224. 



Yellowi-h white, longitudinally flecked with broun. 



Length. -7 inch. 



Philippine*, China, Andaman hies. 



This ]iipa-like species is a form rather unusual in the genus : 

 it may be only a scalariform monstrosity of A', tnnricotu. I 

 have not seen specimens of it. Those from the Andamans are 

 said to he proportionally shorter than the type. A". nnilnlifi'ra. 

 Phil. (tig. 224 . is probably the same species : it is said to come 

 from China. If identical, it will have priority. 



