1884.] £>OJ [Cope. 



external wall is longer than in any of the other genera of the family, ex- 

 tending to a point half-way between the inferior edge of the foramen and 

 the middle of the last superior true molar tooth. It is curved both inwards 

 and downwards just posterior to the foramen. 



The superior molar teeth do not differ from those of M. guyotianus, M. 

 antiquus and M. latifrons. The canines are very robust, and are separated 

 from the first true molar by a considerable diastema. 



Measurements. M. 



Length from occipital condyles to line of postglenoid . 



processes 046 



Length from occipital condyles to line of preglenoid 



border 060 



Length from occipital condyles to line of postfrontal 



process 110 



Length from occipital condyles to Hue of canines, in- 

 clusive 220 



Length from orbit to canine inclusive 076 



Width of occipital condyles inclusive 050 



" " occiput at paroccipitals 031 



" between otic bullae 015 



" at postglenoid processes inclusive 093 



" of skull above glenoid surfaces. 110 



" below orbits 094 



' ' between orbits 064 



" at fundus of canine alveoli ; about 029 



" between last upper molars, inclusive... .080 



palate at second true molars 033 



" " third premolars 031 



" between superior canine. . . 021 



Depth of occiput to foramen magnum .038 



" " " " basioccipital 057 



" " skull at last superior molar exclusive 050 



" " " " first premolar, exclusive 046 



" " zygomatic arch above glenoid facet 021 



Diamelers base crown superior canine^ ^ ' ' 



t- transverse 012 



Length diastema to first premolar 0185 



" premolar series 0365 



" true molar series 045 



Diameters P-m. iv { anteroposterior 011 



*- transverse 014 



Diameters M. i { anteroposterior 014 



*. transverse 015 



Diameters M. hi /anteroposterior 018 



•-transverse. .021 



