IMPRESSIONS OF THE PAST 31 



are broad depressions bearing the marks of coarse hair, 

 where one creature had apparently sat on its haunches 

 in order to use its fore limbs to the best advantage. 

 Other footprints there are in this prison-yard; the 

 great round "spoor" of the mammoth, the hoofs of a 

 deer, and the paws of a wolf (?), indicating that here- 

 about was some pool where all these creatures came to 

 drink. More than this, we learn that when-these prints 

 were made, or shortly after, a strong wind blew from 

 the southeast, for on that face of the ridges bounding 

 the margin of each big footprint, we find sand that 

 lodged against the squeezed-up mud and stuck there to 

 serve as a perpetual record of the direction of the wind. 



REFERENCES 



Almost every museum has some specimen of the Connecticut 

 Valley footprints, but the largest and finest collections are in the 

 museums of Amherst College, Mass., and Yale University, 

 although, owing to lack of a Museum building, none of the Yale ■ 

 specimens are now on exhibition. The collection at Amherst 

 comprises most of the types described by Professor E. Hitch- 

 cock in his "Ichnology of New England," a work in two fully 

 illustrated quarto volumes. Other footprints are described and 

 figured by Dr. J. Deane in "Ichnographsfrom the Sandstone of 

 the Connecticut River." They have been carefully re-studied by 

 Dr. R. S. Lull who has gathered much new information in regard 

 to the animals represented. The results of his studies are recorded 

 in a book entitled "Triassic Life of the Connecticut Valley," 

 published by the State of Connecticut. 



The Track of a Three-toed Dinosaur 



