44 JIEBRA. 



dinated to the longitudinal ribs. Ash-color to dark chocolate, 

 mostly light banded between the spiral rows of tubercles. 



Length, 'O-'T iiu-li. 



Indian Ocean, Philippines, New Zealand, Central Polynesia. 

 A'. vtbe.r. Reeve, not Say (tig. 209). is tin elongated, immature 

 shell of this species: to which I refer also, A. yeniculata. A. 

 Ad. (tig. 210), and A r . xixtroidtia, G. and H. Nevill (tig. 211). 

 A". Kcalpta. Marrat (tig. 212 . is described as passing into A 7 . 

 on the one hand and A". rorticata on the other. 



N. MLRICATA, Quoy and Gaimard. PI, 14, tigs. 214-218. 



'Whitish or yellowish, with narrow bands or blotches of chest- 



nut or chocolate. 



Indian Ocean, Madagascar, New Ireland, Polynesia. 



Mr. Marrat considers this a variety of A", xubxpinosa, 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 AV 

 horrida, Bunker (tig. 216), N. Gruneri, Reeve (tig. 217), and A*. 

 curta, Gould (fig. 218). 



N. GRUNERI, Dunker. PI. 14, tigs. 219-222. 



White or yellowish, sometimes obscurely banded or spotted. 



Length, *65-'8 inch. 



Philippines. 



Distinguished by its regular, close sculpture of bead-like 

 tubercles, forming both longitudinal and revolving series. The 

 synonyms are N. hispida, A. Ad. (tig. 220), A'. Web'jei, Petit 

 (tig. 221), said- to come from West Coast of Africa (doubtful), 

 and A", acinom, Gould (tig. 222). 

 N. ECHINATA, A. Ad. PI. 14. tigs. 223, 224. 



Yellowish white, longitudinally flecked with brown. 



Length, *T inch. 



Philippines, China, Andaman Isles. 



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

 it may be only a scalariform monstrosity of A^. muricata. I 

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

 said to be proportionally shorter than the type. A\ noddlifera, 

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

 from China. If identical, it will have priority. 



