690 



THE AMERICAN NATURALIST [Wn.. XLI 



to be certain that the peat is in place in the section and does not 

 represent more recent drift material; however, the opinion of the 

 collector and all of the circumstantial exidence are stron<^ly in 

 favor of the view that it is a trne IMcMstocene do|)osit, somewliat 

 older than the overlyino; beds. 'I'he argument for this interpre- 

 tation may be briefly stated as follows: — 'I'lu^ j)eat w^hich was 

 uncovered over an area two by ten feet had every appearan{;e of 

 forming an iiit<'<ri'al i)art of the section. The material itself is 

 very similar to the somewhat more ar^rilhiceous material occurring 

 at the same level, and in place, in section \o. 2. Sev<Mi sj)ecies 



vin/inun.a M\\\, Qmrrns prinn. Linne, Qiurms nlf/ra^Aune, 

 BciuJa ?n(/rn T.inne, Plalanns orrUh nhdis \ \\mvj\irphin^ ramlini- 

 ana Walt, and Ulnim alala Michx. 



The deposits record iiroo-ressive chanoes in the conditions of 



lower grav(>l bed |>robably repres(Mits materia! deposited near the 

 mouth of a stream with considerabli> cni-rent, din-inu' the brief 



