IMPRESSIONS OF THE PAST 47 
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 bound- 
ing 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 Con- 
necticut Valley footprints, but the largest and finest col- 
lections are in the museums of Amherst College, Mass., 
and Yale University, although, owing to lack of room, 
only a few of the Yale specimens are on exhibition. 
The collection at Amherst comprises most of the types 
described by Professor E. Hitchcock 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 “Ichnographs from the Sandstone of 
the Connecticut River.” 
Fig. 8. — The Track of a Those-toed Dinosaur. 
