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Fig. 137.—Three figures showing the cranial evolution of Titanotherium. Upper figure, T. trigonoceras; middle figure, T. elatum; lower figure, T. platyceras. (After Osborn.)
Page:Mammalia (Beddard).djvu/285
Fig. 137.—Three figures showing the cranial evolution of Titanotherium. Upper figure, T. trigonoceras; middle figure, T. elatum; lower figure, T. platyceras. (After Osborn.)