Ml II II III 





1 



\. Type specimen of Erpelosaiints siiilfitilis Sfoodie, from the Cannelton Shales of Pennsyl- 

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



1. Skeletal elements of I-'.ryops sp. indet., from the Pittsburgh Red Shale at Pitcairn, 

 Pennsylvania. <7=nearly complete vertebra; b and r=ribs; rf=pleurocentrum; 

 f^neural arch and spine. Originals in the Carnegie Musetim at I'ittsburgh. 

 After Case. 



3. Photograph of amphibian footprints, I~>roiopus, aiiitiicus Branson, from the Mississippian 



shales of Giles County, Virginia. X %. Courtesy of E)r. Hranson. Original in the 

 Museum at Oberlin College. 



4. Photograph of type of T/iiniif>iis aii/iqtuis Marsh, the amphibian footprint from the 



Devonian of Pennsylvania. X %. Courtesy of Dr. Lull. Original No. 7S4, Vale 

 University Must-urn. 



