BULL. QEOL. SOC. AM. 



VOL. 11, 1899, PL. 40 



Figure 1. -Reproduction of Footprints of Batrachichnus plainvillensis, sp. nov. from Plainville, 



Massachusetts 



Left-hand fragment of shale shows original impressions. Right-hand fragment is a mold cast in 

 the succeeding shale layer. Parts of two large footprints can be seen at extreme right and left of 

 fragments. 



SliowrHIrs 



Figure 2.— Reproduction of Surface of Shale Layer 



scratches and imprints attributed to amphibia touching mud bottom in act of swimming 

 or crawling. Locality 10, Plainville, Massachusetts 



AMPHIBIAN FOOTPRINTS 



