148 



MAURICE G. MEHL 



that their combined width is equal to the interorbital Width. 

 Their length is 6 ; mm. and combined width the same. 



Fig. 2. — Machaeroprosopus andersoni, details of the posterior end of the skull as 

 seen from above. Restored portions are indicated by lighter shading and less heavy 

 outlines. Two-thirds natural size. 



The postfrontals are small and make but a small part of the 

 orbit boundary, as is usually the case. 



The relation of the postorbitals is not clearly shown. The 

 posterior extent of these bones cannot be determined, for that 

 portion of the skull is restored. 



