FOSSIL MASTODON AND MAMMOTH REMAINS. 33 



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

 only partly re-excavated water course. 



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



Clarinda.—ln the valley of the Nodaway, near Clarinda, some 

 teeth of the mastodon have been found. 



(Iowa Geological Survey (White), Vol. I, p. 3.53.) 



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 Elepbas 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 AVisconsin in age. 



