[118] Marsh, Amer. Journ. Sci. xliii. 1892, p. 447.
[119] See W. D. Matthew, Bull. Amer. Mus. Nat. Hist. ix. 1897, p. 303.
[120] Or perhaps rather to the primitive Ungulates Condylarthra. It is especially compared with Periptychus of that group.
[121] The scapula of P. bathmodon is unknown.
[122] For the structure of this genus and of Coryphodon, see Osborn, Bull. Amer. Mus. Nat. Hist. x. 1898, p. 169.
[123] Osborn, Bull. Amer. Mus. Nat. Hist. x. 1898, p. 81.
[124] Gadow, A Classification of Vertebrata, Recent and Extinct, London, 1898.
[125] See Osborn, American Naturalist, February 1893, p. 118.
[126] It is not absolutely clear whether both or only one genus ranged into America. Different opinions have been expressed.
[127] It must be remembered, however, that there is a suggestion of a prehensile character in the hand of Phenacodus (see p. [203]).