LIST OF ILLUSTRATIONS 



Phororhacos, a Patagonian Giant of the Miocene 



Frontispiece 

 From a Drawing by Charles M. 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. 



