THE DINOSAURS 95 



Professor Marsh, and seized upon by the news- 

 papers, which announced that he had discov- 

 ered a Dinosaur with a brain in its pelvis. 



In their great variety of size and shape the 

 Dinosaurs form an interesting parallel with 

 the JNIarsupials of Austraha. For just as 

 these are, as it were, an epitome of the class 

 of mammals, mimicking the herbivores, car- 

 nivores, rodents and even monkeys, so there 

 are carnivorous and herbivorous Dinosaurs — 

 Dinosaurs that dwelt on land and others that 

 habitually resided in the water, those that 

 walked upright and those that crawled about 

 on all fours ; and, while there are no hints that 

 any possessed the power of flight, some mem- 

 bers of the group are very bird-like in form 

 and structure, so much so that it has been 

 thought that the two may have had a common 

 ancestry. 



The smallest of the Dinosaurs whose ac- 

 quaintance we have made were little larger 

 than chickens ; the largest claim the distinc- 

 tion of being the largest known quadrupeds 

 that have walked the face of the earth, the 

 giants not only of their day, but of all time, 



