[matthbw] 



PAL/EOZOIC BATRACHIAN FOOTPRINTS 



113 



Classification of Pal.^ozoic Batrachian Footprints— United States 



AND Canada. 



Unplaced Tracks. 



C— Cherotherium Reiteri, Wm. D. Moore, '73. C— Sauropus, antiquior, Dawson. 

 Dev. Thinopus antiquus, Marsh '96. C— Allopus littoralis, Marsh. Notam- 

 phibia magna, E. Butts, 91-92. 



Sphaeropezium leptodactylum, A. T. King, '45. S. pachydactylum, A. T. 



King, '45. S. ovoidactylum, A. T. King, '45. S. thœrodactylum, A. T. 



King, '45. According to Lyall these species of King are artifacts, (fide O. P. Hay). 



The above scheme is based upon the number o-f toe marks pre- 

 served in the impression made b)^ the animal on the mud or sand. 

 It will be seen that several authors have given the same generic name 

 to tracks' that are very diverse. I have quoted the generic names as 

 given by the several authors, so that those who consider that the foot- 



