Dilophosaurus
('two-ridged reptile')
Early Jurassic.
Discovered 1942 in
Northern Arizona by University of California expedition.
Described by Dr. Sam
Welles in 1954.
20 ft (6m) in length.
Long slender teeth used
for tearing not biting.
Long powerful hind legs.
Crest
on head made from two thin ridges of bone side by side, like half dinner plates
set up on end.