NO. 3 



GRAND CANYON FOSSIL FOOTPRINTS — GILMORE 



6i 



Description. — Stride about 330 mm.; width of trackway 120 mm. 

 Hind foot: Five digits, third and fourth long, slender, subequal in 

 length, and usually directed straight forward in the direction of 



Fic.32.—Collcttosaunispciitadactylus. Type. No. 11,527, U.S.N.M. 

 Diagram of trackway. About ^ natural size. 



movement. The fifth digit originates well back on the side of the sole 

 and is diverted strongly outward. The first is weak and about half 

 the length of the median digits. Sole Apparently long, but none of 

 the hindfoot impressions is sufficiently clear to show the precise shape 

 of the sole. Roughly estimated the pes may have a total length of 



