FOSSIL HORSE. 381 



The identification of the fossil teeth respectively re- 

 ferred, in the works of Cuvier, Jager, and Kaup, to the 

 Rh. tichorhinus, Kirchlergensis, and MercMi, with the 

 Rh. leptorhinus^ demonstrates a further range of that 

 species, which we now know to have been associated with 

 Rh. 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 Rh. leptorhinus from the fresh- 

 water (lignite) beds on the Norfolk coast near Cromer, 

 which demonstrate the occurrence of this species in the 

 same deposit with the Rh. tichorhinus. 



I have not, hitherto, met with any specimens of the 

 Rhinoceros leptorhinus from the ossiferous caves of Eng- 

 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 



