Triassic, Jurassic, Cretaceous/ Were noted for creatures voracious!/ In times Mesozoic,/ One had to be stoic;/ The things that could eat you-/ Good gracious!"" Polhamus doesn't show us much in either the versification or the imagination departments, but her 21 rhymes do give saurophiles the chance to chant such tongue-tempting names as Saltoposuchus, Trachadon and Pachycephalosaurus (there's also one on ""Paleontologist"") in rhythm, and for the less well acquainted there is a brief note (actually no briefer than the mostly four-line rhymes) describing each beast and feature under disucsion. And the success of Armour's Dozen Dinosaurs (KR, 1967) indicates how far even rudimentary nonsense on this subject can go.