Fossil Footmarks found in Westmoreland County, Pa. 349 



Fig. 7, c. 



Hind foot. Reduced one half. 



perceptibly different. On the hind foot the toes are 5, on the 

 fore foot they are but 4. The plantar surface of the hind foot is 

 long, narrow, and terminates in a distinct heel. The fifth toe, 

 whose imprint is rather indistinct, stands out nearly at a right angle 

 with the foot, and much resembles the human thumb. Indeed both 

 feet look not unlike the imprint of a human hand. The length of 

 the hind foot is 5 J inches ; the extreme spread of the toes 5| inches ; 

 the interval between them, from an inch to an inch and a half; 

 the length of the toes about 3 inches. On the fore foot, the fourth 

 toe stands out obliquely, like the fifth toe on the hind foot : length 

 of the toes 2^ inches ; length of the foot 4^ inches ; the extreme 

 spread of the toes 4f inches; the interval between them from one 

 to two inches; the nails on some of the toes were quite distinct. 

 At the external side of all the tracks there is a protuberance which 

 much resembles the rudiments of another toe. 



The imprint of the fore foot seems to indicate that the weight 

 of the animal was sustained mainly by it, for the fore feet have 

 made a deeper impression than the hind. I have given the ave- 

 rage size of these tracks ; a few were discovered, though not very 

 distinct, which were some inches larger. 



The following cuts represent parts of the slab from which the 

 preceding figures are taken, on a scale of two inches to the foot. 



Vol. XL VIII, No. 2.— Jan.-March, 1845. 45 



