FOSSIL HORSE. 381 
The identification of the fossil teeth respectively re- 
ferred, in the works of Cuvier, Jiger, and Kaup, to the 
Rh. tichorhinus, Kirchbergensis, and Merckii, with the 
Rh. leptorhinus, demonstrates a further range of that 
species, which we now know to have been associated with 
Lh. tichorhinus in France, in Germany, and also, by the 
instructive specimens obtained by Mr. Brown, in our own 
island. 
Mr. Fitch of Norwich possesses specimens of upper and 
lower molar teeth of the 2h. leptorhinus from the fresh- 
water (lignite) beds on the Nerfolk coast near Cromer, 
which demonstrate the occurrence of this species in the 
same deposit with the 2h. tichorhinus. 
I have not, hitherto, met with any specimens of the 
Rhinoceros leptorhinus from the ossiferous caves of Hng- 
land, nor does the species appear to have extended its 
range to Siberia, where the tichorhine Rhinoceros most 
abounded. In this country, as in Wirtemberg, Darm- 
stadt, Central France, and Italy, the remains of the lepto- 
rhine Rhinoceros have been left in tranquil deposits of 
fresh-water lakes or rivers. 
Mr. Brown informs me, that at Clacton these deposits line 
a basin of the London clay, upon which they immediately 
rest. The deepest part of the basin is twenty feet below 
the surface, and is covered by a stratum about six inches 
thick, of red sand, with marine and fresh-water shells ; 
above this, by a deposit five feet thick of peaty matter, with 
interrupted beds containing marine and fresh-water shells : 
above this is another thin layer of red sand, with marine 
and fresh-water shells ; then comes another bed of peaty 
matter four feet thick, overlaid by a thin bed of red sand, 
with fresh-water shells; and this is covered by a stratum 
of flinty gravel, four to five feet thick, which supports the 
