93 



through it, a large mass of remarkably fine old red sandstone at- 

 tracted my attention. Imprinted upon it, I was surprised to find six 

 distinct impressions of foot-marks, in a double row of tracks, each 

 mark being duplicated by the hind foot falling into the impression of 

 the fore foot, but a little more advanced. The strata here are tilted a 

 little over the vertical, and the surface of rock exposed was about 

 twelve feet by six feet, the whole of which surface was covered with 

 ripple marks and the pits of rain drops, beautifully displayed in the 

 very fine texture of the deep red sandstone. 



The six double impressions distinctly show, in the two parallel 

 rows formed by the left feet on the one side and the right feet on the 

 other, that the animal had five toes on the fore feet, three of which 

 toes were apparently armed with unguinal appendages. The length 

 of the double impression is four and a quarter inches ;* the breadth 

 four inches; the distance apart in the length of the step of the ani- 

 mal thirteen inches; across, from outside to outside, eight inches. 











The figure is rather more than half the natural size of the impression. 



