EVOLUTION OF THE SKULL AND TEETH OF EOCENE TITANOTHERES 



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Figure 237. — Lower jaws and teeth of Lambdotherium popoagicum 

 Side view. Natural size. A, Am. Mus. 4863 (type); Wind River valley; front part restored from Am. Mus. 14899. B, Am. Mus. 14906; Alkali Creek, Buck 

 Spiing; an old individual. C, Am. Mus. 14899; Alkali Creek, Buck Spring. D, Am. Mus. 2989; Wind River valley. 



