NO. 3 



GRAND CANYON FOSSIL FOOTPRINTS — GILMORE 



47 



Geological occurrence. — llennit shale (30 feet above base), 

 Permian. 



Description. — Stride aI)oiit 144 mm. ; width of trackway about 

 114 mm. Hindfoot: Length about 38 mm.; width 40.5 mm. Five 



Fig. 21. — Hylol'us hcrmitanus. Type. No. 11,517, U. S. N. M. Dia- 

 gram of trackway. About i natural size. 



toes. The fourth toe is longest, the others progressively shorter in- 

 ward. The fifth is shortened, divergent, and with a tendencv to turn 

 backward. There seem to have been sharj) claws on the second, 

 third, and fourth digits as in //. minor Dawson, but the fifth had a 

 4 



