SKULL OF THE PLEISTOCENE TAPIR. 
63 
cingulum is observed, although between the paracone and me.tacone 
pillars there is a small tubercle and the suggestion of a cingulum 
which is best marked on the third and fourth premolar and on the 
first molar. At the. inner side of the cheek teeth between the proto- 
cone and hypocone pillars is a strong tubercle which in the specimen 
at hand is particularly pronounced on the fourth premolar and on 
the third molar. 
The molar teeth are larger than the premolars, the antero- 
posterior measurement of the three molars is 73 mm., while that of 
the four premolars is 76 mm. The molars may be recognized bv 
their shape, being more nearly square than are the premolars. They 
may also be recognized by the very large size of the parastyle. The 
first molar is distinguished from those which follow by its smaller 
size as well as by the relatively small size of the tubercle between 
the paracone and hypocone pillars. 
• From the posterior side of the paracone of both molars and pre- 
molars a raised line or ridge passes to the anterior wall of the 
metacone, thus passing across- and blocking the valley between the 
transverse crests. A similar raised line passes from the posterior 
side backwards and inwards and joins the cingulum of the posterior 
margin of the tooth. The paracone is supported on the inner side 
by a medium heavy buttress or ridge which passes to the floor of the 
valley between the crests. 
I11 the lower jaw from the same locality which serves as a para- 
type there is preserved the third and fourth premolars and the first 
molar. The lower jaw, as judged from this part preserved, appears 
to have been relatively heavy and short. The height of the jaw is 
50 mm ; the width beneath the second molar is 33 mm. The molar 
tooth has a greater transverse width than the premolars, while the 
antero-posterior measurement is about the same as that of Pm 4 . 
The molars are thus relatively broader than the premolar. Both 
molars and premolars have an anterior and posterior cingulum. 
On the outer margin the anterior cingulum is connected by a raised 
line with the protoconid. The transverse ridges are scarcely 
notched. At the inner side of the molar tooth a slight tubercle is 
developed between the anterior and posterior transverse crests. 
There is also a suggestion of a tubercle on the inner side of Pm 4 . 
At the outer side of the teeth no tubercle is developed. Pm 2 , lack- 
ing in this specimen, is represented by a detached tooth from the 
right side, No. 7026. 
