54 



MH. C. S. TOMES ON THE 



[Jan. 16, 



and there is a well-defined granular layer. The course of the 

 enamel prisms is similar to that seen in Hycenodon and in recent 

 Carnivora. 



Text-fig. 20. 



Pac7zy«m«.— Dentiue perished. The enamel prisms are arrano:ed in bundles like 

 Tlyanodon, but the plane of the section is not quite the same. 



Pachycena (Lower Eocene) (text-fig. 20). — The dentine structure 

 is gone, but the enamel prisms are very distinct, no tubes are sesn 

 in it, and the prisms are gathered into bundles pursuing a course 

 similar to that seen in Hycenodon or in Hycena. 



Text-fig. 21. 



Oxymna. — Dentine well jjreserved. 



Oxycena (Lower Eocene) (text-fig. 21). — Here again similar con- 

 ditions obtain, though the section not being in exactly the same 



