Of The Naticidae, please help

[Alumette]

Dear friends! I`m a beginner in shellcollecting, so I have questions much more than the shells in my collection
For the most part I identify my percious shells par le net but often.... I don`t find out any answer on my questions.
In the March 2012 I`ve brought from The Maldives some seashells of which I don`t know the names.
Please, take a look at the fotos and determine this one of the  family of Naticidae shells. These dots on the surface are so nice.....



Many thanks in advance!

[helmetapointe]

               
      Looks like  "Naticarius onca (Röding, 1798) "
             
            I'm not sure.
               

[Alumette]

helmetapointe , thank you very much for the reply, your opinion makes me more assured in my guess

[conchylinet]

To me it is also N. onca.

[Alumette]

To me it is also N. onca.

conchylinet,  thank you very much for the opinion