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#1 is in the family Neritidae. #3 could be Cerithiidae, or a Morula or some other small Muricid.  I agree with all your other family designations, but all of these except perhaps one of the Nassarius are juveniles and positive ID is going to be difficult.  <span class="petit">--Last edited by Paul Monfils on 2009-03-03 21:01:51 --</span>
Hi, it would be very helpful to know where they were collected. I don't know of any keys ( I find those too laborious to use anyway)but you could try the website
Here are some shells i collected.

Please help me identify them.

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I would like to also know where i can get keys to identify them down to species level.

thanks in advance!  <img src="images/icones/icon10.gif" alt="images/icones/icon10.gif" style="border:0" />
thanks Paul and Dave.

Paul, which Nassa are you refering to as a juvenile?

Dave, they were collected off the coast of Penang island in Malaysia.
Nr. 2 could be a juvenile Notocochlis gualtieriana

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Thanks mikede!

by the way, how do i know if a shell is a juvenile or not?
AFAIK there is generally no easy way to tell whether the shell is a juvenile or not. For some groups like Cypraea it is easy to tell apart a juvenile and an adult because of the characteristical shell shape and/or colors. For other species there are only hints like a thin shell or a thin lip or short spines, but all these could just as well belong to the normal appearance of that particularly species.

I have a juvenile N. gualtieriana just like yours one from Malaysia (Langkawi). I wasn't able to identify it until recently when I got an adult N. gualtieriana specimen from Australia.

alright, thanks mikede!  <img src="images/smiley/smile.gif" alt="" border="0" />