18 
THE SCIENTIST. 
lish left by tlic vvaves. This is repeated 
for a considerable time, as shown by the 
number of deposits. A drought then 
occurs during which the sun's hot rays 
pan^h and crack the surface. This is 
followed by a great stOrm which comes 
from tlie southeast; hail-stones descend 
and the lightning fires the neighboring 
forest. A high wind scatters the frag- 
ments of charred wood over the beach, 
the accompanying flood deposits a vast 
amount of alluvial sediment and finally 
subsides, thus rock number ninety-one 
became a part of geological histoiy. 
As quite a variety of the foot-prints 
have been found which will, from time 
to time, be figured, it is considered ad- 
visable to present the' following names 
and descriptions. 
Cenus — Notalacerta. 
( Ety. Nota^ mark; lacerta. lizard. ) 
Feet four, toes four or five expanding 
outward; tail dragging; steps separated. 
Species — Notalacerta missouriensis. 
Each foot has five toes and each toe 
tapers from the base to the extremity. 
The three middle toes curve inward; toes 
long, compared to size of foot. Length 
of front foot, one and one-eighth inches; 
length of hind foot, one and one-halt' 
inches; the spaces between the prints 
alternate one and one-half inches and 
three inches; these spaces also alternate 
with the opposite side; lateral width 
from center to center of print, two and 
one-eighth inches; tail one-eighth of an 
inch in width and continuously dragging. 
Locality — Upper coal measures of 
Kansas City, Missouri. 
Species — Notalacerta jacksonensis. 
There are four toes on the front foot and 
five toes on the hind foot; all the toes 
are short and nearly the same width 
throughout. The front foot is six-eighths 
of an inch long and tne hind foot is one 
and one-eighth inches long. The spaces 
between the prints alternate one and one- 
quarter inches and two and seven-eighths 
inches; these spaces also alternate with 
the c>pposite side; lateral width from 
center to center of print, two and seven- 
eighths inches; tail three-thirty-seconds 
of an inch in width and continuously 
dragging. 
