Kansas University quarterly . d of second crest go 3. Some specimens of tusks in the Washburn museum I havenot seen, but Mr. F. J. Titt of that college has kindly sent me thefollowing notes thereon: Specimen A. (See cross section in Fig. A.), a fragment at theend of a tusk 181^2 inches long, with a vertical diameter, at thelarge end, 1^4 inches. This specimen has only a very small por-tion of the enamel adhering to it. Specimen B. (See cross sections in Fig. B.), a fragment 16inches long, representing probably an injured tip. Measurements: Vertical diameter, large end 5 inches Vertical diamete
Kansas University quarterly . d of second crest go 3. Some specimens of tusks in the Washburn museum I havenot seen, but Mr. F. J. Titt of that college has kindly sent me thefollowing notes thereon: Specimen A. (See cross section in Fig. A.), a fragment at theend of a tusk 181^2 inches long, with a vertical diameter, at thelarge end, 1^4 inches. This specimen has only a very small por-tion of the enamel adhering to it. Specimen B. (See cross sections in Fig. B.), a fragment 16inches long, representing probably an injured tip. Measurements: Vertical diameter, large end 5 inches Vertical diameter, small end 3^3 Horizontal diameter, large end 3^ Horizontal diameter, small end 2 Specimen C. (See cross section in Fig. C), a fragment of a tipi6y2 inches long, very slightly curved. Its two diameters areequal, 2^/^ inches. The tusk is characterized by ridges and shallowgrooves varying in width from J/j^ to i inch. These tusks all show bands of enamel running the length of thetusk and covering about y:-, the Synonymy.—An attempt to construct a synonymy which wouldbe anywhere near complete, would lead too far afield. I shallrecord therefore, only the names pertinent to this discussion. I02 KANSAS UNIVERSITY QUARTERLY. TETRACAULODON SHEPARDII, COPE. ?? Tetracaulodon mastodon toideum, Godman; Trans. Am, Phil. Society, N. S.,Vol. 3. p. 478, (1830) ? Mastodon shepardii; Leidy, Proc. Ac. Nat. Sc, Phila., 1870, p. 98. ? Mastodon shepardii; Leidy, Proc. Ac. Nat. Sc, Phila., 1872, p. 142. ? Mastodon obscurus; Leidy, Rept. U. S. G. and G. Survey of Terr., Vol. i, , Plate 21, (1873). Mastodon shepardii; Cope, Am. Naturalist, 1884, p. 525. Dibelodon shepardii; Cope, Proc. Am. Phil Soc, Vol. 22, p. 5, (1884). Tetrabelodon shepardii; Cope, Preliminary Report on the Vertebrate Paleon-tology of the Llano Estacado, p. 57, Plate 15. It requires no extended study to discover that in the taxonomyof mastodons a confusion little short of hopeless reigns of this
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