80 Notice of a New Species of Batrachian Footmarks. 
impressed, and hence the inference, that if the other set of feet 
touched the ground, their forms would necessarily have been re- 
tained. But on the contrary, there is situated, invariably, be- 
hind each footprint, a deep elliptiform impression, pointing for- 
ward and somewhat outward, the pair being more widely sepa- 
rated than the footprints. (See the diagram, B. B.) 
From a patient investigation of these curious forms, aided at 
length by an exquisite specimen, the inevitable conclusion is, 
that the compound impressions were produced by the animal 
when advancing by leaps, and that from its peculiar organization, 
gue set of feet did not touch the earth.* It is difficult to explain 
’* To render these views more intelligible, the accompanying diagram is given, 
taken from a beautiful specimen in the possession of T. Leonarp, Esq., reduced 
one half in linear measure. 
The footprints. Each 
foot is comprised of five toes, 
the central one having four 
re sone while each lat- 
ral one from it, diminishes in 
saaste by one, in their order. 
The impress is exquisitely 
fine. The spread of each foot, 
impressions, five inches in 
n, y one and one half 
in breadth. The outline is 
not only Tea but the 
impression varies much in 
depth. pel is a deep ae: 
ity at a, 
cial at b. “Thi is deep and. con- 
cave atc. At d, d, d, it is 
superficial, but the ould is 
clear. The appearance of 
this impression suggests the 
probability that it was produ- 
ced by the flexed limbs while 
in a sitting posture, a, b,c, be- 
} ? 
d » the succeeding 
one, ac upon and overlap- 
ping it. The i impress ion io 
the teehee is absolutely life-like. At e, on the opposite we pce it is ob- 
literated by a splendid ornithichnite. The impressions in question iated 
with several species of bird tracks and with rain-drops in wonderful sosnessiiatl 
