I wasn't necessarily suggesting that one population is immature - only that
the two populations were produced at different times, grew at different
rates due to environmental factors then present, and thereby attained
different average sizes before reaching maturity and terminating growth.

Paul M.

> ----------
> From:         Orstan, Aydin
> Reply To:     Conchologists of America List
> Sent:         27, November 2001 2:10 PM
> To:   [log in to unmask]
> Subject:      Re: Polygyra cereolus/septemvolva
>
> The size variation exists in adults which form a reflected lip after they
> stop growing.
>
>