934 THE JOHN DAY FAUNA. 



Measurements (2fo. 1). 



Length of skull to inion 080 



Length of muzzle to orbit 027 



Length to postglenoid process 056 



Length of skull to paroccipital process 071 



Width at middle of zygomata 040 



Width at posttympanics 030 



Width between canine teeth 007 



Width between sectorials behind 020 



Width between otic bullae 007 



Width of foramen magnum 009 



Width of occiput at foramen 019 



Width between orbits 0115 



Elevation of occiput from foramen 014 



Length of dental series from I. 1 038 



Length of molar series 027 



Length of true molars 009 



Length of sectorial 007 



Diameters of first tubercular 5 ^° ^ P _._-, 



< transverse Witi 



0038 



0052 



_. . , . , , S anteroposterior . 



Diameters second tubercular < 



( transverse 



The second skull already mentioned has its superior walls entire pos- 

 terior to the interorbital region. The temporal ridges are, as in various 

 species of foxes, first convergent, then divergent, and then convergent 

 again to a very short sagittal crest close to the inion. The measurements 

 of this specimen are as follows: 



Leugth of cranium to front border of orbit, M. .0525; elevation of occiput, .058; 

 length of superior sectorial, .007; length of first tubercular, .0058; width of first tu- 

 bercular, .0078; width of second tubercular, .005; length of second tubercular, .0035, 



The most perfect mandibular ramus was found separately (No. 5). It 

 agrees in all necessary respects with the crania. It is, like the muzzle of 

 the latter, attenuated anteriorly, and the molars have corresponding propor- 

 tions. The fourth premolar is compressed, and has an acute posterior 

 cutting lobe, besides acute anterior and posterior basal tubercles. The 

 inner tubercle of the sectorial is very prominent; there is no trace of 

 tubercle at the external base of the principal one as is seen in G. latidens. 

 The heel is quite concave ; like the first tubercular, it is narrower than the 

 corresponding tooth of G. latidens. The latter tooth has a wide anterior 

 ledge, two elevated tubercles, and a heel with raised semicircular border. 



