434 ANOPLOTHERIUM. 
the crown, very characteristic of the genus, and such a 
tooth in a perfect state (fig. 176) has been discovered in 
the eocene freshwater deposits at Binstead in the Isle of 
Wight. 
The first premolar chiefly differs in the increased thick- 
ness and greater development of the basal ridge ; which, 
in the three larger succeeding premolars, assumes the 
Fig. 176. Fig. 177. 
Upper canine, nat. size. Anoplotherium First upper premolar, nat size. Ano- 
commune. plotherium secundarium.  Seafield, 
Isle of Wight. 
character of an inner lobe, and a second lower ridge is 
developed. When the crown of the anterior premolar is 
much worn, the enamel lining the valley between it and 
the basal ridge forms an island, as in the tooth the grinding 
surface of which is figured in cut 177. This tooth, which 
is from the freshwater deposits at Seafield quarry, Isle of 
Wight, indicates by its size the smaller species of Anoplo- 
there, which Cuvier has called An. secundarium. 
The true molars are three in number, on each side 
of both jaws of the Anoplotherium : those above have large 
square crowns (fig. 178) divided into an outer and an inner 
lobe by a valley, 6, extending from the imner side, two- 
thirds across, contracting as it penetrates. A second valley 
crosses its termination at right angles, and forms a curved 
