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<tr><td width="247" bgcolor="#000000"><font color="#C7AF0C">Name means "Helmet Lizard"

Corythosaurus was a large, plant-eating, duck-billed dinosaur (family Hadrosauridae). It was about 10 meters long, 2 meters tall at the hips, and may have weighed up to 5 tons.

It had a hollow, bony crest on top of its long head in the shape of a helmet flattened on the sides. Corythosaurus' nostrils went up through the crest. The crest may have been used to make sounds, as a cooling device, courtship displays, and/or as a sense-of-smell enhancer (Corythosaurus' olfactory lobes, the part of the brain that sense smell, were located within the crest). Males had larger crests than females and juveniles.

Corythosaurus had a toothless beak and hundreds of cheek teeth that it used to grind up its food. It walked on two legs (or four), had shorter arms, and a long, heavy tail. It had no natural defenses. Its femur (thigh bone) was 108 cm long.

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<td background="http://212.242.245.94/BB/saurus.jpg" valign="top" height="286" width="247">Saurus</td></tr>
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