284 



TITANOTHBRES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



^4x^ kid^ 



Figure 236. — Lower jaws and teeth of Lambdotherium popoagicum 

 Natural size. A, Am. Mus. 14899, Alkali Creek, Buck Spring; lower jaw, inferioi surface. Bi, Am. IMus. 14906, Alkali Creek, Buck Spring; lower 

 jaw, infeiior surface; an older individual. Bi, The same, showing upper surface of symphyseal region. Ci, Am. Mus. 4863, Wind River valley; 

 type jaw, outer side view. Cs, The same, lower piemolar-molar series, crown view. 



