. Bulletin of the Department of Geology. Geology. 1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 563 mined as P. fairbanksi. These less massive teeth, in which the meta- conid-metastylid column is somewhat longer anteroposteriorly and the inner gutter wider than in the larger form, are referred tentatively to Pliohippus tantalus. Of the two lower dentitions referred to P. tantalus, no. 21789 was found between the uppermost and the second basalt flows 2y2 miles north of Ricardo Post Office; no. 21790. Figs. 180 to 182. Pliohippus tantalus? (Merriam). Inferior cheek-teeth, natural siz
. Bulletin of the Department of Geology. Geology. 1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 563 mined as P. fairbanksi. These less massive teeth, in which the meta- conid-metastylid column is somewhat longer anteroposteriorly and the inner gutter wider than in the larger form, are referred tentatively to Pliohippus tantalus. Of the two lower dentitions referred to P. tantalus, no. 21789 was found between the uppermost and the second basalt flows 2y2 miles north of Ricardo Post Office; no. 21790. Figs. 180 to 182. Pliohippus tantalus? (Merriam). Inferior cheek-teeth, natural size. Fig. 180, P2 to M2, no. 21789, occlusal view; fig. 181, P4, no. 21789, outer view; fig. 182, M, and M;, no. 21790, outer and occlusal views. Eicardo Pliocene, Mohave Desert, California. was found by J. P. Buwalda about 500 feet below the lowest basalt flow and 400 feet above the base of the Ricardo beds, two miles above the mouth of Iron Canon. In no. 21789 (figs. 180, 181) the moderately worn tooth crowns are long and heavily cemented. Compared with no. 21346, a large Pliohippus specimen from a much higher situation in the Ricardo, the crowns are relatively much narrower with approximately the. 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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