Artist's rendering of a full, intact thalattosuchia, a fish-like crocodile from the Jurassic Period. Credit: By Jon Hughes (non-commercial use only)	Artist's rendering of a full, intact thalattosuchia, a fish-like crocodile from the Jurassic Period. Credit: By Jon Hughes (non-commercial use only)	Bones from an ancient crocodile in rock chiseled out of the Blue Mountains in northeast Oregon. At right is a humerus bone measuring 8.5 inches, or 21 centimeters, in length. To the left are rib bones. Photo by Jim Barlow