PLATE XXXV. 



EOPHYTON (?) (p. 63). 



Figs. 1, 2. Views of casts of trails on the under side of a thin slabof the Middle Cambrian (Tonto) 



sandstone. (Collection United States National Museum.) 

 Fig. 3. View of casts of trails on the St. Croix sandstone of Wisconsin. (Collection United 



States National Museum. ) 



174 



