EXPLANATION OF TLATES 

 Plate 1 



Anwwbatrachus montanensis, new species. No. 7635 U.S.N.M. type. Trackway 

 on lower half of slab shows toe scratches, belly drag and tail grooves. About 

 one- third natural size. 



Plate 2 



Ammobatrachus montanensis, No. 7635 U.S.N.M. Part of type slab. Various 

 imprints of feet. Tracks crossing the slab diagonally at the bottom pertain 

 to some other animal. About one-third natural size. 



Plate 3 



Ammobatrachus montanensis, No. 7635 U.S.N.M. Part of type slab. Various 

 imprints of feet with distinct tail drag. About natural size. 



