|The Burroughs master illustrator J. Allen St. John's illustration of P. olsoni|
Close by us something rose to the surface of the river and dashed at the periscope. I had a vision of wide, distended jaws, and then all was blotted out... - Chapter 4, "The Land That Time Forgot," Edgar Rice Burroughs, 1918
The first native of Caspak the reader encounters is, alas, not technically a dinosaur, though it is one of another ruling dynasty of the Mesozoic - a Plesiosaurus. "The Land That Time Forgot" is not the first story to feature a Plesiosaurus, but as far as I can tell, it is the first to do battle with a German submarine, which earns it a special place in the annals of Man vs. Dinosaur.