. Transactions of the American Philosophical Society. ig. 2. Posterior view—two-thirds natural size. Plate V. Figs. 1, 3 and 5. Sections of skull of M. leidi/i (see page 7).Figs. 2, 4 and 6. Sections of skull of M. jeffersoni Fig. 7. Dentition—natural size, and arranged on the plate in natural position. Figs. 8 and 9. Views of exterior side and triturating surface of left canine molar; natural size. P. S.—Prof. E. D. Cope, in letters to Prof. Udden, determined the teeth of Equus major, found in the same bed asthis skull, and also determined the age of the formation as belonging to the Equus be
. Transactions of the American Philosophical Society. ig. 2. Posterior view—two-thirds natural size. Plate V. Figs. 1, 3 and 5. Sections of skull of M. leidi/i (see page 7).Figs. 2, 4 and 6. Sections of skull of M. jeffersoni Fig. 7. Dentition—natural size, and arranged on the plate in natural position. Figs. 8 and 9. Views of exterior side and triturating surface of left canine molar; natural size. P. S.—Prof. E. D. Cope, in letters to Prof. Udden, determined the teeth of Equus major, found in the same bed asthis skull, and also determined the age of the formation as belonging to the Equus beds. He afterwards referred tothe skull, in Am. Nat., Vol. xxiii, p. 660, as only found in the TicJioleptus formation of Kansas. This was a lapsuscalami which had escaped his notice until after the above was in type, and, at his request, it is hereby figures, PL xxxi, were reproductions of three photographs made in Kansas. The photographer had placed thebroken left canine-molar upside down In the right (the wrong) alveole.—J. Trans. Am. PhiL Soc New ^l, a/II. ?! Jl.
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