PLATE V.. 

 Teiassic Dinosaurs. — Footprints. 



Page. 

 FlG. 1. Footprints of small dinosaur (Ammopus); showing impressions of both 



fore and hind feet; one-twelfth natural size 151 



Fig. 2. Footprints of bipedal dinosaur (Anonioepus) ; showing where the ani- 

 mal sat down ; one-twelfth natural size 151 



Fig. 3. Footprints of large bipedal dinosaur (Brontozoum) ; one-twentieth 



natural size 151 



FlG. 4. Footprints of large dinosaur (Otozoum); showing impressions of hind 



feet alone: one-twentieth natural size 151 



Fig. 5. Footprints of bipedal dinosaur; one-twelfth natural size 151 



The specimens represented in figs. 1-4 are from the Connecticut Fiver sand- 

 stone of Massachusetts, and the one shown in fig. 5 is from nearly the 

 same horizon in Arizona. 

 254 



