54 



MR. C. S. TOMES ON THE 



[Jan. 16, 



and there is a weU-deiined granular layer. The course of the 

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

 Carnivoi'a. 



Text-fig. 20. 



Fachycena. — Dentiue perished. The enamel prisms are arrano:ed in hundles like 

 llyanodon, 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 veiy distinct, no tubes are sean 

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

 similar to that seen in Hyeenodon or in Hycena. 



Text-fig. 21, 



O.vycena. — Dentine well preserved. 



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

 ditions olitain. thous'h the section not beinfr in exactly the same 



