NO. 3 



GRAND CANYON FOSSIL FOOTPRINTS — GILMORE 



57 



Although the evidence is not entirely conclusive, in view of the 

 many similarities pointed out specimen No. 11,598, U. S. N. M., is 

 provisionally referred to the present species, and our knowledge of 

 the species may now be elaborated by its description. 



This specimen was found in situ in the Hermit shale about one- 

 quarter mile west of the sign post " Red Top," on the Hermit Trail, 



Comparative Measurements of Forefeiet 



No. 11,598 

 U. S. N. M. 



Type No. 2,145 

 Vale Museum 



Length 48 



Breadth 70 



Length of digit I 12 



Length of digit II 14 



Length of digit III 14 



Length of digit IV 13 



Length of digit V 1 n 



m m . 

 48.5 

 50.0 

 12.6 



15-0 



17.0 



?i5.5 



in Grand Canyon National Park, Arizona, about 30 feet above the 

 Hermit-Supai contact. The length of stride is about 240 mm., width 

 of trackway unknown. Forefoot smaller than hind and placed in 

 front of the hindfoot impression. Hindfoot: Plantigrade, length 

 about 80 mm., greatest width 80 mm. Five relatively short digits 

 having rounded terminations, without claws. Fifth toe set off from 



Fig. 28. — Parabaropus coloradensis (Lull) Type. No. 2,145, Yale 

 Museum. Outline of manus, unrestored. About \ natural size. 



the others and directed strongly outward. Sole elongate, more than 

 three times as long as the longest toe. Digits have the following 

 lengths: I = 14 mm., H = 21 mm., HI = 23 mm., W = 18 mm., 

 V = 16 mm. Forefoot: Length about 48 mm., width about 70 mm. 

 Five toes radially arranged. Toes as in the pes, short with rounded 

 terminations without claws. Palm nearly twice as wide as long, and 

 broadly rounded behind. The foot as a whole is turned inward 



