The best way is to study the animals. More in common:
alatus is mostly found around florida, pugilis in the south en west caribbean.

But, is there a difference between alatus and pugilis?

Good luck
Alex F.

At 17:41 22-8-02 -0500, you wrote:
>Yep, It's Me Again!
>
>How do you tell Strombus alatus from Strombus pugilis?   Are
>they both found in the Gulf of Mexico near Sarasota.   If I were to go by
>color alone, I would have both species.   But I am not sure.
>
>Can someone help?   Abbott says something about the angle of the lip; is
>this a good indicator?
>
>Thanks!
>Linda