PALAOTHERIUM. All 
enamel, from which the two oblique peninsular folds are 
°° 
continued into the body of the tooth, corresponding with 
the primitive depressions on its surface, displayed by the 
germ of the molar here described (fig. 112). 
Fig. 113. Fig. 114. 
First premolar, nat. 
Much worn upper molar, nat. size.  Paleotherium 
size. Pualeotherium erassum ; medium; Binstead, 
Binstead, Isle of Wight. Isle of Wight. 
The opposite condition of the grinding surface is shewn 
in a molar tooth of a Paleothere (fig. 113), from the lower 
freshwater formation at Binstead; the valleys, @ and 4, 
are both reduced to islands of enamel. The specimen is 
in the Museum of the Geological Society. 
The first premolar (fig. 114) is the smallest and most 
simple of the series: its crown is narrower transversely ; 
the two outer depressions are shallower: there is a longitu- 
dinal depression along the inner side of the grinding sur- 
face, bounded behind by a prominent ridge: the unworn 
crown forms an elongate cone; but the surface is soon 
reduced to an uniform flat tract of dentine, in which state 
this tooth is commonly found. The specimen figured, 
from the Binstead quarry, is from a young animal. In the 
second premolar the internal fold is nearer the anterior 
border of the crown than in the third and fourth pre- 
molars, which differ from the true molars only by a slight 
inferiority of size. 
