First of all- don't expect your dahlia seedlings to look anything like the parent plant- they won't- too many gene combinations for that to happen. The seeds themselves look kind of like flattened earwigs- complete w/ 2 "feelers" on one end-- must be all that time they spend with the little monsters as blooms!
You can see pictures of dahlia seeds in our "Seedlings" album at this site--

Here is a link that might be useful: Wynne's Dahlia Albums

Thanks for the tip and the link. I enjoyed going through that site. It helped a lot. The flowers were beautiful too.