. Bulletin of the Department of Geology. Geology. 1913] Merriam: New Protohippine Horses 441 sent a type related to Neohipparion, but are probably to be included in Protohippus or Pliohippus. Several much worn upper molars from the Ricardo region seem clearly of an ad- vanced Protohippus or Pliohippus type, and may represent the same species as the type of P. Figs. 4a and 4b. Protohippus ( ?) tantalus, n. sp. P4(?). No. 19434, natural size. Late Tertiary near Ricardo, California. Fig. 4a, occlusal view; fig. 4b, outer view. Measurements of No. 19434 P4?, anteroposterior diameter P4?

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. Bulletin of the Department of Geology. Geology. 1913] Merriam: New Protohippine Horses 441 sent a type related to Neohipparion, but are probably to be included in Protohippus or Pliohippus. Several much worn upper molars from the Ricardo region seem clearly of an ad- vanced Protohippus or Pliohippus type, and may represent the same species as the type of P. Figs. 4a and 4b. Protohippus ( ?) tantalus, n. sp. P4(?). No. 19434, natural size. Late Tertiary near Ricardo, California. Fig. 4a, occlusal view; fig. 4b, outer view. Measurements of No. 19434 P4?, anteroposterior diameter P4?, transverse diameter P4'?, height of crown mm. 24 48 Transmitted December 15, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of California, Berkeley. Dept. of Geology. Berkeley : The University Press

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