EVOLUTION OF THE ELEPHANT LULL. 



651 



PiQ. 7. — Evolutionary changes of Proboscidia. Based upon restorations modeled by 

 R. S. Lull, a, ElepJias columM; b, Mammut americanum ; e, TetraTielodon angtistidens; 

 d, Palseomastodon ; e, Moeritherium. 



