EOTIIEKIUM ^GYPTIACUM. 
211 
behind the canine alveolus are two more alveoli about the same size, and immediately 
behind these again two small pits, the posterior of which is much the smaller; at this 
point the alveolar border of the jaw is thin and sharp. Separated from the last- 
mentioned small pit by a very short interval are two rather small alveoli in close 
contact. The anterior molar is separated from these alveoli by an interval of about 
•7 cm. In the absence of teeth from the front of the jaw it is not possible to 
determine the dental formula with certainty, but it seems that between the canine and 
the molars there may have been two one-rooted premolars and two with two roots 
each ; it is very probable, however, from Abel’s account of the upper premolars, that 
one (or perhaps both) of the pairs of alveoli assigned to the two-rooted premolars may 
have been occupied by two (or four) single-rooted teeth. 
Text-fig. 67. 
B.A 
w/. 
Mandible of Eotherium agyptiacum (?) : A, from above ; B, from left side, 
c., canine ; i. 1-3, incisors ; m. 1-3, molars ; m.f., mental foramina; pm. 1-4, premolars ; sym., symphysis. 
About 5 nat. size. 
The molars may be described as bilophodont, each having a well-developed talon. 
Each transverse crest consists of a low, blunt, outer cusp and a higher, sharper, inner 
one. From the inner anterior angle of the antero-external cusp a ridge runs inwards 
on to the front of the tooth ; from the inner anterior side of the postero-external cusp 
a ridge runs across the main valley to the cusp in front. In the first and second 
molars the talon seems to consist of a simple transverse ridge connected with the 
inner end of the postero-external main cusp ; in the third molar the talon is more 
complex, and consists of three small elements, the middle one of which joins the 
2 E 2 
