Regarding tyrannosaurid teeth --

With I believe only one known exception, dinosaurs did not have
variegated teeth.  All the teeth in any given species were identical.
Thus, there is no dinosaurian equivalent to bicuspids, molars, incisors,
etc.

If I am not mistaken, the same may hold true for all reptiles, ancient
and modern.

Eugene Dillenburg
Lead Developer, Philippines Coral Reef exhibit
John G. Shedd Aquarium
1200 South Lake Shore Drive
Chicago, Illinois  60605

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"I did ask you not to say 'mattress,' didn't I?  Now I've got to stand
in the chest."

-- M. Python, Episode 8, 1969