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Expedition 1916. A. Thomson A.C. Whitford }Members of party Geo. Stoll W.D. Matthew No1. Merychippus cf. republicanus Palate and jaws Niobrara R., 1 m. E. of Hay Springs Bridge Pliocene (volcanic ash layer). Whitford, May- No.2. Smilodon lower jaw Hay Springs quarry, Niobrara R. Pleistocene Thomson, June No.3. Elephas ?imperator Skull, lower M2, rib etc. (one large block and 3 small blocks ) Niobrara R., Hay Springs Quarry Pleistocene, just below quarry layer in a lignitiferous fine clay probably forming the base of the Sheridan. June 1st Thomson + Stoll. Tusks were exposed in part and had been chopped into (by Yale party in 1914?) but skull not found. Badly crushed. Some associated fragments of limb bones etc. not saved. No.4. Rhinoceros head. Pliocene. Snake Creek. 35 mi.