396 IVORY AND THE ELEPHANT 



curvature of the tusk. This museum also has a skeleton of 

 Mastodon giganteus from southern Michigan. 



The largest tusks found in the State of Nebraska were 

 secured at Campbell in Franklin County, and belong to 

 Elephas columhi. The tips seem to be weathered, and the 

 tusks were probably 12 ft. 6 in. in length measured on the 

 outer curve, and 30 in. in circumference at the thickest 

 part. A pair of tusks found in the loess in a railroad cut 

 in Gosper County are 10 ft. 6 in. long by 7 in. in diameter, 

 with an unknown amount cut from the base. A very fine 

 tusk from Red Willow County, probably of Elephas pri- 

 migenius, is 12 ft. 2 in. long, and 22 J in. in circumference at 

 the thickest part. The Buffalo County mammoth has a 

 tusk 5 in. in diameter and 6 ft. 9 in. long, with an unknown 

 portion carried away by prairie dogs in burrowing. 



The tusks of Mastodon americanus found in Thurston 

 County are almost straight with a slight upward curve, and 

 measure 4 J inches in diameter and 8 ft. in length, with an 

 unknown amount broken from the base by persons who at- 

 tempted to pry out the skull and tusks. Of the longirostral 

 mastodons, the tusk of Tetrabelodon lulli were 5 ft. 6 in. long 

 and 4 in. in diameter; Eubelodon morrilli, 4 ft. long and 4 J in. 

 in diameter; Tetrabelodon willistoni, 2 ft. to 2 ft. 6 in. long, 

 and 2 in. to 4 in. in diameter, with pronounced enamel bands.* 



A tusk of Elephas columbi, originally measuring 12 ft. 7 in. 

 in length and weighing 217 pounds, was brought from Alaska 

 by J. D. Beekman of Bloomfield, Nebraska. With it were 

 two teeth each weighing 17 pounds. This fine tusk was un- 

 fortunately broken in transit. The University of Nebraska 

 possesses two tusks, two leg bones and ribs of the mammoth 

 Elephas columbi, found 30 ft. below the surface, with other 

 fossils, by some gold miners who were panning for gold in 

 gravel and frozen ice thirty miles southwest of Dawson. 



♦Communicated by Erwin H. Barbour, State Geologist of Nebraska. 



