SCIUKID^E— SPERMOPHILUS EICLIALiDSONI AND VA1JS. 



857 



Table XCIX. — Measurements of aire skulls of Spermopiiilu.h richardsoni var.. richardsoni. 



Table C— Measurements of thirteen skulls of SrERMOPHiLus richardsoni var. townsendi. 



'Very old. 



tQ'jite youDg. 



