38 ANIMALS OF THE PAST 



versally believed to be those of birds. So it is 

 greatly to the credit of Dr. Deane, who also 

 studied these footprints, that he was led to 

 suspect that they might have been made by 

 other animals. This suspicion was partly 

 caused by the occasional association of four 

 and five-toed prints with the three-toed im- 

 pressions, and partly by the rare occurrence of 



Fig. 6. — Where a Dinosaur Sat Down. 



imprints showing the texture of the sole of the 

 foot, which was quite different from that of 

 any known bird. 



In the light of our present knowledge we 

 are able to read many things in these tracks 

 that were formerly more or less obscure, and 

 to see in them a complete verification of Dr. 

 Deane's suspicion that they were not made by 

 birds. We see clearly that the long tracks 



