216 



HISTORICAL GEOLOGY 



Fig. 129 



A Ganoid, Catopterus redfieldi, from the Triassic sandstone of Connecticut. 



(After Newberry, U. S. Geological Survey, Monograph 14.) 



were the creatures which left the numerous foot-prints up to 15 or 

 18 inches in length in the Newark sandstone of the Connecticut 

 Valley (Figs. 130, 131). 



Fig. 130 

 Tracks of a small two-legged Dinosaur on a slab of Triassic 

 sandstone from the Connecticut Valley. The tracks 

 are about 4 inches long. (W. J. Miller, photo.) 



Of the more modern reptilian forms, the Turtles and Lizards 

 made their first appearance, the latter only in late Triassic time, 

 but none of them became common. 



