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The origin of the fittest Plate XIV . PLATE XIV Fig Fig Fig Fig FiGUBEs OF Casts of BeainCii ambers of Extinct Mammalia Ficr PeriptychxLS rTiabdodon cast of roof of brain case showing middlebrain hemispheres and part of olfactory lobes natural size Original from Puerco bed of New Mexico Fig Uinta therium mirabile one