392 PATAGONIAN EXPEDITIONS: PALAEONTOLOGY. 



In the type skull, there are but three molars on the right side, where 

 M- is wanting. This tooth is present on the opposite side, where it is 

 proportionately no more reduced than in C. lustmtus. 



The broad, blunt points of the upper canines are the result of fracturing, 

 and are not characters of specific importance. 



MEASUREMENTS. 



Skull, width across jugal arches (approximate) . . . . . .090 



Face, length, premaxillae to anterior border of orbit ..... .060 



Cranium, width at postorbital constriction ....... .oil 



Nasals, length (approximate) ......... -057 



" width anteriorly .......... .009 



" " posteriorly .......... .026 



Palate, length 076 



" width between canines . . . . . . . . . .014 



" " " posterior premolars . . . . . ... .020 



" " "MA .037 



Upper dentition, length from median incisor to MA (approximate) . . -79 

 " " " of premolar series . ...... .032 



" molar " 0245 



Upper median incisor, width of crown ....... .0012 



" lateral " " " " 0018 



Upper canine, antero-posterior diameter at alveolar border . . . . .010 



transverse " " 007 



Anterior superior premolar, antero-posterior diameter. .... .006 



" " " transverse " . . . . . .0025 



Median " " antero-posterior "..... .0085 



" " " transverse "..... .003 



Posterior " " antero-posterior " . . . . .0085 



" " " transverse " 0038 



Mi, antero-posterior diameter . . . . . ... . . .007 



" transverse " ......... .005 



, antero-posterior " ......... .0078 



" transverse " ......... .006 



, antero-posterior " ......... .0088 



" transverse ......... .007 



MA, antero-posterior " ......... .003 



" transverse " ......... .007 



Atlas, width across anterior cotyles . . . . . . . . .035 



" " of neural arch ......... .016 



" " " inferior " ; .009 



Eleventh dorsal, length of centrum . . . . . . . . -0175 



" " width of posterior face of centrum ..... .0165 



" " depth " " " " 010 



