Take a look at this: http://ballpython.com/page.php?topic=morph

It shows pretty much all proven morphs. There are others links I could give you , like check out http://vpi.com/4VPIInventory/VPIPriceList/BallThumbsGallery(1Jan02).htm or www.ralphdavisreptiles.com or www.newenglandreptile.com

Look around those sites, you should find all the "technical" terms on the morphs, as well. (I.E., the axanthic is lacking all yellow pigment, not just "grey and black", lol)

Hope I've helped.
Jennifer