LAGOMOEPHA. 887 



The superior molras have the form usual in this genus. The crowns 

 are grooved on both the external and internal faces. The first has less 

 transverse extent than the others (except the sixth), and has a shallow 

 groove on the anterior face. The sixth molar is a small and simple cylin- 

 der. Of the inferior molars, the first has the greatest anteroposterior 

 diameter, while the transverse is equal to that of the others. Of its external 

 grooves the posterior is the strongest. The last molar is much the smallest, 

 and its section is a figure 8, with the wider circle next to the fourth molar. 

 The anterior column of the other molars wears so as to be higher than the 

 posterior. Its inner edge carries a shallow groove, while the external edge 

 is narrow and smooth, and their alveoli terminate in a swelling below the 

 first molar (Pm. III). The groove of the superior incisors is nearer the 

 internal than the external side. The inferior incisors are perfectly flat. 



Measurements. 



M. 



Length of skull from inion to above Pm. II 048 



Length from inion to base of postorbital process (axial) 032 



Width of skull at glenoid cavities 020 



Width of skull behind bases of postorbital processes 009 



Vertical diameter of orbit 0125 



Depth of skull and mandible in place, at middle of orbit 0310 



Depth of mandible at condyle 0310 



Length of mandible to exit of incisor 044 



Depth of mandible at last molar Oil 



Depth of mandible at middle of diastema 005 



Length of superior molar series 012 



Width of Pm. II (above) 002 



Width of M. I : 003 



Length of inferior molar series 013 



Length of inferior Pm. Ill 003 



A fragmentary skeleton is associated with jaws and teeth of this spe- 

 cies, and they are presumably parts of the same animal. They resemble 

 the corresponding parts of Lepus sylvaticus, but are relatively smaller. The 

 centrum of a lumbar vertebra is much depressed. There is a prominent 

 anterior inferior spine of the ilium. On the internal side of the distal end 

 of the tibia the ligamentous groove is more, and its bounding process is less, 

 distinct than in L. sylvaticus. 



Measurements. 



M. 



Width of centrum of lumbar vertebra 0083 



Depth of centrum of himbar vertebra 0040 



