CORYPHODON EOC NUS. 301 
The large extinct tapiroid Pachyderms have left their 
remains on the continent in both miocene and eocene form- 
ations: in England they are represented by scanty but 
extremely interesting fossils, which have been obtaimed 
from the eocene deposits of the London and_ plastic 
clays. 
If the specimen, fig. 103, which is a fragment of the 
right branch of the lower jaw, containing the last and 
part of the penultimate molar teeth, be compared with 
the figures which Cuvier has given of the corresponding 
parts of the Lophiodon Isselanus, (Grand Lophiodon d’Issel, 
‘Ossemens Fossiles,’ 4to, 1822, Tapiroids, pl. iii, fig. 3,) 
or of the Lophiodon medius, (loc. cit. fig. 1,) their family 
likeness will be readily appreciated ; but the jaw-bone 
below the last tooth in the English fossil is deeper in 
proportion to the size of that tooth, than in the Lophiodon 
Isselanus, and still more so than in the Loph. medius 
which differs by its more slender jaw from the Loph. Is- 
selanus. But the more important discrepancies which 
determine the sub-generic distinction of the large extinet 
tapiroid lophiodont Pachyderm of our eocene clay, are 
Fig. 104. 
Last molar and part of penultimate molar of Coryphodon eoczenus. 
Upper and outer view ; nat. size. Essex coast. 
