1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 487 



Tig. 49. Meryehippus inter montanus Merriam. P., to M., no. 21459, natural 

 size. Barstow Miocene, Mohave Desert, California. 



Fig. 50. Meryehippus calamarius stylodontus? , n. var. P 2 to Mi, no. 19819, 

 natural size. Barstow Miocene, Mohave Desert, California. 



Incisors and Canines. — The incisors are well shown in specimen 

 21463, which is associated with teeth of the Meryehippus c. stylodontus 

 type. All of the incisors of the upper dentition (figs. 51a, 51b) are 

 clearly cupped, and cement fills the valleys of the middle incisors to 

 a considerable depth. I 3 is distinctly cupped. 



