PLATE LXXI 



Lower Dentition of Mesatirhinus, Metarhinus, and Dolichorhinus 

 Drawings by E. S. Christman. Natural size. (See pp. 393, 394, 404, 424, 425) 



A, Mesatirhinus petersoni (Ara. Mus. 1512), Laclede Meadows, Washakie Basin, Wyo., level?, left lower premolar-molar series, 



crown view. 



B, Mesatirhinus sp. (Am. Mus. 2355), lower beds, south of Haystack Mountain, Washakie Basin, Wyo., level Washakie A(7) (Glove 



Spring), right lower premolar-molar series, crown view, drawing reversed. 



C, Dolichorhinus hyognathus (Am. Mus. 1850), White River, Utah, level Uinta B 2, left lower cheek teeth (pi-ms), crown view. 

 D', Metarhinus fluviaiilis (Am. Mus. 2059), White River, Utah, level Uinta B 1, external view of lower dentition. 



D^, The same, crown view. 



