196 LIFE OF THE PLEISTOCENE 



The biota cataloged in the previous pages forms but a small part of the life 

 which actually invaded the englaciated territory. Many additional species 

 will doubtless be found as more attention is given to the subject and more 

 systematic work is carried on. Careful discrimination of the different strata 

 of old lake deposits will add greatly to our knowledge concerning the succession 

 of faunas, and it will be found that the greatest results can be obtained by 

 studying the material from the modern ecological standpoint, as was the case 

 with the Chicago deposits described in Chapters I, II, and III. 







