Vol. 5] 



Kellogg. — Rodent Fauna. 



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Measurements. 



No. 12565 No. 11571 L. townsendi 



P 3 , anteroposterior diameter 2.9 mm. 3.1mm. 3.2mm. 



Pj, anteroposterior diameter 2.7 2.<> 2.8 



M„ anteroposterior diameter 2.4 2.7 2.8 



M 2 , anteroposterior diameter 2.(5 2.5 2.3 



M 3 , anteroposterior diameter 2.0 



P 3 , transverse diameter 2.8 2.5 3.3 



P 4 , transverse diameter 3.2 3.0 3.3 



M,, transverse diameter 3.1 3.1 3.1 



M.,, transverse diameter 2.8 3.1 3.0 



M : „ transverse diameter 2.0 2.9 



Length of diastema 14.1 17.5 



Incisor, transverse diameter 2.5 2.7 



Incisor, anteroposterior diameter 1.9 2.2 



Issued July 13, 1910. 



