LIST OF ILLUSTRATIONS 



Phororhacos, a Patagonian Giant of the Miocene 



Frojitispiece 

 From a Drawing by Charles R. Knight 



Fig. Page 



1. Diplomystus, an Ancient Member of the 



Shad Family ..... 4 



From the fish-bed at Green River, Wyoming. From a 

 specimen in the United States National Museum. 



2. Bryozoa, from the Shore of the Devonian 



Sea that Covered Eastern New York . 10 

 From a specimen in Yale University Museum, prepared 

 by Dr. Beecher. 



3. Skeleton of a Radiolarian Very Greatly En- 



larged ....... 17 



4. Cephalaspis and Loricaria, an Ancient and 



a Modern Armored Fish . . .24 



5. Pterichthys, the Wing Fish ... 32 



6. Where a Dinosaur Sat Down . . .38 



7. Footprints of Dinosaurs on the Brownstone 



of the Connecticut Valley . . .40 



From a slab in the museum of Amherst College. 



