FOSSIL MASTODON AND MAMMOTH REMAINS. 33 



in the Tarkio Valley. Evidences point to an ancient, filled and 

 only partly re-excavated water course. 



(Iowa Geological Survey, Vol. XI, p. 413 ) 



Clannda.in the valley of the Nodaway, near Clarinda, some 

 teeth of the mastodon have been found. 



(Iowa Geological Survey (White], Vol. I, p. 353) 



PLYMOUTH COUNTY. 



Akron. Very recently, in the vicinity of Akron, Professor 

 Todd has found elephant bones. These were in the drift. 



(Iowa Geological Survey, Vol. X, p. 117.) 



Professor Todd reports, concerning this find, as follows: ''The 

 teeth, tusk, and bone fragments found near Akron were in the up- 

 per part of the till, under loess. They were found in a well about 

 two miles east of Akron, and were in the possession of the finders 

 the last I knew. The teeth were those of a mastodon, much worn. 

 The length of the crown of one tooth I measured was nine inches, 

 and the breadth about three. The diameter of the tusk was about 

 three inches." 



POLK COUNTY. 



Avon. A few years ago, workmen excavating in the gravel 

 pit at Avon unearthed numerous bones, among which were a 

 large tusk and other bones of some very large animal, either mas- 

 todon or mammoth. Unfortunately, no attempt to save the 

 bones was made, so they became broken and lost. The drift in 

 which these bones were found is post-Kansan pre- Wisconsin (?) 



in age. 



(Reported by John L. Tilton, Simpson College.) 



Polk City. A perfectly preserved molar tooth of EJephas pri- 

 migenius was found in 1898 by a Chicago and Northwestern rail- 

 road employee at Polk City. The tooth occurred in the gravels 

 which occur at that place, and are evidently late Wisconsin in age. 



