1. Type specimen oi Erfietosaurus scutpiilis itlood'^e, from the Ca.nnelton Sha.\es of Pennsyl- 

 vania. Original in the University of Chicago, Walker Museum. 



i. Skeletal elements of Eryopi sp. indet., from the Pittsburgh Red Shale at Pitcairn, 

 Pennsylvania. a=nearly complete vertebra; b and c=ribs; rf=pleurocentrum; 

 ^=neural arch and spine. Originals in the Carnegie Museum at Pittsburgh. 

 After Case. 



3. Photograph of amphibian footprints, Dromopus aduncus Branson, from the Mississippian 



shales of Giles County, Virginia. X Va- Courtesy of Dr. Branson. Original in the 

 Museum at Oberlin College. 



4. Photograph of type of Thinopus antiquus Marsh, the amphibian footprint from the 



Devonian of Penn,sylvania. X "%. Courtesy of Dr. Lull. Original No. 784, Yale 

 Universitv Museum. 



