Hello,
No, juvenile Strombus don't have stromboid notches.
I remeber when I first started collecting shells as a kid, I had
several shells that I couldn't identify, even as far a family...
they turned out to be, you guessed it, young strombus! My juvenile
Strombus gigas is still pink inside with strong cording at the top
of the columella, Strombus costatus is pure white inside with no cording,
luhuanus is pink with a dark columella. What you have to do is look
at the spire only and go through your books comparing that, then you
will find the right adult match.
Happy Easter,
Peter
 
 
>Can anyone tell me if juvenile Strombus gigas, (say about 25 cm long)
>has an obvious strombal notch?  (I am starting to think that this is
>what my "mystery" shells may be - the ones I thought might be a
>Hemifusus or a Busycon).  My specimens don't have one.
>Thanks!
>
>Nora Bryan
>Calgary, Alberta
>CANADA
>
>
Peter Egerton, Vancouver, Canada
Collector of worldwide Mollusca