206 EOCEXE FAUNiE. 



oflf. The third incisor is a small tooth with small truncate crown, and enamel on 

 the external face only. The second incisor is compressed, and has an elongate 

 crown with the anterior face convex in both directions. The posterior edge 

 is beveled like that of a rodent, but has a thin investiture of enamel, which 

 is worn away by use on a low median ridge. The sides of the crown are 

 covered with enamel. The external side is regularly convex; the inner one 

 is flattened. The first incisor is much smaller than the second, and the sec- 

 tion of the crown is sub round, and narrowed to an angle posteriorly. It 

 is as long as the second incisor, and therefore much longer than the third. 



The symphysis is coossified and is nearly horizontal in its direction, its 

 plane making an acute angle with the alveolar line. As a consequence the 

 incisor teeth are directed forwards at the base, curving slightly upwards at 



their summits. 



Measurements. 



u. 



Length of posterior five molars 047 



Length of true molars 026 



Diameters p.-m. in 5 anteroposterior OOd 



( trausverso OOd 



Diameters p. m. iv 5 anteroposterior 008 



( transverse 010 



Diameters m.-ii S anteroposterior 009 



< transverse 013 



Length of inferior dental series (axial) 074 



Length of inferior true molars 028 



Length of inferior premolars 021 



Diameter of base of canine 007 



Length exposed anterior face m. ii 0115 



Width posterior face I. ii 0035 



Width posterior face I. iii 0020 



Diameters p.-m. iii ^anteroposterior 0070 



I transverse 0040 



Diameters m. ii ^anteroposterior 008 



( transverse 0065 



Diameters m. iii ^anteroposterior 0110 



( transverse 0060 



Diameters crown superior 1. i \ '""S (oblique) 0080 



I short 0055 



Length of alveolus of I. ii 0090 



Depth of mandibular ramus at m. iii 024 



Depth of mandibular ramus at p. m. ii 014 



Length of alveolar border of preoiaxillary bone 020 



This species is well distinguished from the E. acutidens in the characters 

 of the posterior premolar teeth of the superior series. In the latter, the 

 external lobe of the third superior premolar is much longer, while the inter- 

 nal lobe is smaller than in the E. hurmeisteri. The external lobe of the fourth 



