Skull of Triceratops SerraHis. 



By Richard Swann Lull, Ph.D. 



AUTHOR'S EDITION, extracted from BULLETIN 



UK IHK 



American ^Xxtseiim ot Natural Jlistovg^ 



Vol. XIX, Article XXX, pj). 685-695. 

 New York, December i*/, i()oj. 



