I saw the segment as well. Was the drawing of _Zuniceratops_? - Or some other ceratopsian being passed off as _Zuni_? The brachiasaur was somewhat Charles Knight-ish, and the Iguanodon was slightly more modern.
I thought that Chris handled himself very well - informed and at ease. He even made an attempt to make a different joke about Bob Dole - called him "_Presidentialosuarus_". (I suspect that he couldn't remember Bob Dole's name). When asked what he wanted to be when he grew up, he answered 'an exopaleontologist' - i.e. someone who studies ancient extraterrestrial life.
The best part of the segment, besides seeing the actual bone; was comparing Chris's love life with James Woods' - surprisingly similar! :-)