The data collected in the foregoing paper by Netta C. Ander- 

 son on the fossil Mastodon and Mammoth remains in Illinois and 

 Iowa, give A^aluable and various information, which seems profit- 

 able to briefly summarize and discuss. It brings together a num- 

 ber of observations made by different parties at different places 

 and at different times, extending back sixty years or more. Some 

 special points suggest themselves for review: 1) the conditions of 

 interment of these animals, 2) their specific determination, 3) 

 their relation to different drifts and -4) their association with 

 other fossils. 



Mode of Interment. 



The eighty odd recorded finds set forth, quite clearly, the con. 

 ditions attendant on the interment of these animals and the man- 

 ner of the preservation of their remains. The broad statement is 

 warranted that the greater number of the animals, whose remains 

 have been discovered, perished in low and boggy localities. In two 

 ■ instances it is clear that they had come in search for water and 

 salt, for near Minooka, in Illinois, parts of the skeletons of six in- 

 dividuals were recovered from the ground near a bog spring, and 

 in Gallatin county, in the same state, numerous bones were found 

 near the "Half Moon" salt lick. 



In the case of sixty recorded fossils, their location is given 

 with sufficient detail to enable us to make inferences as to their 

 mode of interment. We find that remains of thirteen individuals 

 were discovered in stream beds or in undoubted alluvial deposits. 

 Of these, ten consisted of detached teeth, one was a single bone, 

 one was a jaw, and one consisted of a tooth and a bone. Five 

 finds were found in terrace and glacial gravels, and four of these 



