I scanned some of the concept sketches I did for my group's Dinosaur project. They are very rough ideas.
Pteradons and some dudes:

Some general concepts, including a rough sketch of a "jungle" area:

A whoooole bunch of sketches of the raptor character:

Sketch of a Styracosarus and his size in comparison to his rider:

A more detailed raptor head. None of these are scientifically accurate at all, haha:

This is all I have for now. The scanner I was using at the school started acting all weird. I have some more that I'll scan tomorrow, hence the "Part 1."