Here small list of transistional species
Its afew years old and not complete, but its the most complete list a I knew of.
For those of you who do not know what transistion fossils are
They are fossils showing a transistion from one group to another- techically its more complicated than that, all species are on a continium and all fossils are technically transistional
but these listed are the best examples.
here is also some information on evolution for those of you who are interested
note the list above is not a complete list, there are hundreds of examples out there, I am just to lazy right now to find a newer more complete list.