As promised,
Albertosaurus libratus
T. rex
Dunklosteus. A huge freakin' shark-eating placoderm from the Devonian, about 380 Mya
Jaws from a Carcharodon Megalodon, which would have made a snack out of Dunklosteus if they hadn't lived 375 million years apart. Which, IMO, is really quite cool. Most people think that all the really cool, monstrous prehistoric creatures lived back in the Devonian or Jurassic or something. Not true! This guy only dates back 5 million years. So it's quite modern and quite recent(comparatively). There would have been modern whales and such in the ocean back then.
So, Blue Whales, nomnomnom.
Styracosaurus skull. This is a late Cretaceous Ceratopsian totally going all out on the horns-and-frill thing, but actually predating Triceratops by about 10 million years.They're also from different sub-families which shows that the evolution doesn't always proceed in a direct, linear, least-to-most-complex kind of way.
...and of course Triceratops itself. You can see how it and Styracosaurus are related, but also totally different creatures.
I'm going to wrap up here with this pic of Edmontonia rugosidens, one of my favorite armored dinosaurs. It's the 2ft-long forward-facing shoulder spikes that get me with this one.