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I C I I N O L O G Y OF ANN AND A LE.
ACTIJ3ATES TRTASSiE, JARD.
PLATE IX.
Tue impression upon this very curions slab is the only one we have met with in Corncockle Quarry, and is
exceedingly difficult to reconcile with the forms of any known footprint. It consists of two regular but alternate
lines of throe slightly oval hollows or depressions of about 5 in diameter, placed in a triangle, as if they were the
indentations of tliree blunt claws or toes. Sometimes the posterior of these appears as if double, or that there
were two indenting surfaces. There is no trace of a solo or pad, but there is a slight pushing back of the sand
behind each depression. Tlie middle indentation of the triangle forms the posterior hollow. The slab is about
3 feet in length, and there are a series of nine of these triangular impressions on each side, distant from each
other about 2.5, and in width over the impressions of about 4. It is impressed upon a freely splitting slab.
I C H N O L O G Y OF AN NAN DALE.
BATRICHNIS LYELLIT, HARK.
PLATE XII1.
We give this additional or supplementary Plate as the figure of a footprint not hitherto found in the Annaiidale
Sandstones. The slab is from the Geenmill Quarries in the Valley of the Nith, which with some other places
similarly worked, afford impressions varying from those discovered in the opposite Valley, and indicate, that
animal life in these periods was, as well as now, different and local in its distribution. This footprint has
l)een already characterized by Mr. Harkness, and is referred by him, as the name points out, to the itiarks of
the feet of a Batrachian. In these forms tliere is a great discrepancy between the size of the fore and hindfeet,
and in this instance it is remarkable. The pace is extremely regular, deliberate and alternate. The
small forefoot is set doAvn innnediately anterior to the hindei-, and represents three or foui- slightly divided toes
and an undulated sole, the whole breadth being about 6. The hindfoot represents a smooth undulated solo,
with five rather short toes of irregular length, tlie second from the outside being longest, the interior shorter.
I t is about i . 1 in diameter each way. The pace of the animal will have been nearly 3, and the widtli of
the track over the impressions about the same. The impressions of the hindfeet show a slightly ])ushing
back motion.
EAST
Mt
CORNCOCKLE QUARRI
1>£DHALL HUL
+ fHVER ANNAN
L't.V^ I - ' 0 F 1 M E '
SPEDLINGS MOSS
FINIS.
niIN-Tl-;j) JiV W-ril. LIZAKS, 3, ST. JAMES' .SliUAKK, K 1> 1 N il U H G II.