Shibby, there are over 60 different morphs and pattern variations among cornsnakes. It would take a good long post to describe them to you. However, may I suggest purchasing the "Corn Snake Manual" by Bill and Kathy Love? You can generally find it in any chain pet store for $9.95. Or, you can order it directly from their website for $14.10 at
http://www.cornutopia.com and have it shipped to your door anywhere in the US.
If that's not in your budget, you might also try a link to this website
here. This is the website of Don Soderberg and you'll be looking at a list of all of the cornsnakes he sells. He gives short descriptions of what each morph is and what it's made up of.
Hope this helps you.