16 FOSSIL MASTODON AND MAMMOTH REMAINS. 



teeth, one piece of jawbone in which one tooth fitted, four pieces 

 of ribs, and about a panfull of small bits of bones The tusk 

 weighed seventy-three pounds, but was not complete, each end be- 

 ing broken off. The length of the specimen was about five feet, 

 and it measured twenty inches in circumference at the large end 

 and about eighteen inches at the small end. The teeth each 

 weighed twelve and one-half pounds and had a grinding surface 

 nine inches long by four inches broad. The best rib specimen was 

 forty inches long and five and three-fourths inches in circumference 

 at the dorsal end. Another rib, thirty -four inches long, was not 

 complete. The only further notes I have concerning these speci- 

 mens is that the grinding surface is three or four inches shorter 

 than the longest diameter of the tooth." 



(Reported by Frank Leverett, Ann Arbor, Mich.) 



Stillmari's run. Remains of the mastodon were found closely 

 connected with the drift gravels. In 1858 a tooth was found in a 

 little tributary of Stillman's run. The locality is low somewhat 

 marshy. The stream had cut a channel through the black alluvi- 

 um of the low prairie. The tooth , was washed out and lodged 

 against a clump of willows when found. It is a ponderous grinder, 

 weighs seven and a half pounds, is covered with a shining black 

 enamel, and is a fossil in a high state of preservation. 



(Illinois Geological Survey, Vol. V, p. 110.) 



PEORIA COUNTY. 



Peoria The remains of a mammoth, consisting of two molar 

 teeth with a portion of the jaw, were found by Captain Smith in 

 the gravel bed No. 2 of the following section in the Peoria bluff: 



No. 1. Brown prairie clay and soil. 



No. 2. Coarse gravel and sand with boulders. 



No. 3. Clay and sand forming seven or eight distinct beds, 

 some containing coarse gravel and boulders. 



The specimen was presented to the State Cabinet. 



(Illinois Geological Survey, Vol. V, p. 237.) 



