148 



Annals of the South African Museum. 



difference, the two species can still be separated by the difference in 

 shape of the anterior part of the postf rental, the greater relative 

 width between the postorbitals in D. mustoi, and the fact that in D. 

 mustoi the interorbital width is less than the intertemporal, whereas 

 in D. Jcolbei the reverse is the case. 



-J 



FIG. 35. Dicynudon mustoi, Htn. Type. No. 2674. x '-. 



Type. Skull. (S.A. Mus. Cat, No. 2674.) 



Locality. Dunedin, Beaufort West, C.P. 



Horizon. Lower Beaufort Beds. (Cistecephalus zone.) 



DlCYNODON PLANUS, Bl'OOm. 



1913. Broom. Bull. Amer. Mus. Nat. Hist., xxxii. p. 452 ; figs. 13, 14. 



A medium-sized Dicynodon with comparatively short face, and 

 breadth about five-sixths of the length. The interorbital width 

 equal to, or slightly greater than, intertemporal width. Orbits 

 wholly in the anterior half of the skull, looking mainly upwards. 

 Postfrontal large, postorbitals each forming one-third of the parietal 

 bar. 



