222 



VERTEBRATE ZOOLOGY 



as in the strenuous present. Though one of the most grotesque of 

 nature's excesses in all of its curious make up, its central nervous 



FIG. 126. Restoration of Igugftodon. (From Lull, after Heilmann.) 

 PCtJa/ epthfwft'e* d^C FS//*J O b*e>X<*l>5(ai^ *<?veh kkvWjdoBHf? 



system presents one of the prize oddities within the field of biology. 

 It is literally practically brainless, for the nervous content of its cra- 



FIG. 127. Restoration of the armored dinosaur, Stegosaurus. (From Lull, 

 after Schuchert.) 



