איור מתוך ספר מ-1951, בו נראים פרטי טרכודון (Trachodon) וקוריתוזאורוס רועים בביצות לצד פלאוסקינוס (במרכז).
English: Title: The dinosaur book : the ruling reptiles and their relatives Identifier: bookruli00colb (find matches) Year: 1951 (1950s) Authors: Colbert, Edwin H. (Edwin Harris), 1905-2001; Knight, Charles Robert, 1874-1953; American Museum of Natural History Subjects: Dinosaurs; Reptiles, Fossil Publisher: New York : Published for the American Museum of Natural History by McGraw-Hill Contributing Library: American Museum of Natural History Library Digitizing Sponsor: IMLS / LSTA / METRO View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: huge spikes, presumably intended to serve as a pointed reminder to any other dinosaur that might venture closer than was con- sidered proper by Mr. Stegosaurus. Whether the plates along the back served as a really effective protection to the spinal column is a question which at this distant date cannot be verv satisfactorily answered. At least they were decorative. This dinosaur is famous, among other things, for the small size of his brain. In- deed, this was a peanut-headed reptile, if ever there was one,—an animal bigger than an elephant, with a brain about the size of a walnut. It is a remarkable fact that the brain of Stegosaurtis was actually 20 times smaller than the enlargement of the spinal cord in the hip, which served to control the movements of the heavy hind limbs and the powerful tail. Which has given rise to the quaint, and somewhat fanciful story that this dinosaur had two sets of brains—an idea charmingly perpetuated by the late Bert Leston Taylor, a columnist on the Chi- cago Tribune. THE DINOSAUR "Behold the mighty dinosaur, Famous in prehistoric lore, Not only for his power and strength But for his intellectual length. You will observe by these remains The creature had two sets of brains- One in his head (the usual place), The other at liis spinal base. Thus he could reason 'A priori* As well as 'A posteriori.' No problem bothered him a bit He made both head and tail of it. "So wise was he, so wise and solemn, Each thought filled just a spinal column. If one brain found the pressure strong It passed a few ideas along. If something slipped his forward mind Twas rescued by the one behind. And if in error he was caught He had a saving afterthought. As he thought twice before he spoke He had no judgment to revoke. Thus he could think without congestion Upon both sides of every question. Oh, gaze upon this model beast, Defunct ten million years at least." —Bert Leston Tayloh It wasn't quite as bad as all that, but at any rate Stegosaurus must have been pretty much a walking automaton, without much of what might be called original thought. Anktjlosauria The Cretaceous armored dinosaurs were the ankylosaurs, somewhat less startling in appearance than the stegosaurs but perhaps somewhat more effectively protected. These ORNATE ARMOR helped to protect Palaeoscincus (center foreground) from other dino- saurs of his time. To the left is Trachodon, to the right (middle distance) Corythosaurus and (farther away) Parasaurolophus. In the center background are two Struthiomimus Restoration by Charles R. Knipht, copyright The Chicago Natural History Museum Text Appearing After Image: ' Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.