98 E. Hitchcock on new Fossil Footmarks. 
tracks, except when the ani- 
mal changed its course. Width 
of the trace from a quarter to 
half an inch, with a some- 
what feathery appearance on 
each side, such as is exhibited 
by the slight ripples, when a 
body is drawn rapidly through 
water. 
The accompanying cia 
represents the only specim 
of the track of this Znicm 
(the srg gallinaceus 2) 
are also shown—one row of 
seven ia another of four. 
A few scattering quadrupedal 
tracks, not very distinct, exist 
on the slab but are not shown 
in the drawing. 
On first looking at this slab, 
zoum giganteum h 
would soon discover the fourth 
toe, which I have never seen 
n the more than a hun- 
dred tracks of the Brontozounm 
giganteum which have fallen 
under my notice, and which 
onter and inner toes of the 
Gigandipus are of almost ex- 
seg i length, but never 
in the Brontozoum. No 
aie or phalangeal impres-_ 
sions are seen upon the track | 
of the Gigandipus, although 
the rock is extremely favora- 
ble for showing such sires ie 
ters, in 
foot. 
