^00 The American Naturalist. [September, 



vents plants from gaining a foot-hold on the eastern shores 

 where the lakes are of considerable size. 



6. The flora of the moor has among its species some of the 

 rarest plants of the region. 



7. A considerable number of species otherwise confined to 

 the Atlantic coast occur here. It does not follow, as Paine as- 

 serts (1. c, p. 92), that a maritime bay occupied this depression. 



8. The distribution of moor-loving plants suggests that once 

 conditions of humidity and temperature enabled them to grow 

 very much more abundantly than now. 



9. The commercial value of the moss bids fair to devastate 

 the moors, and their recovery will, of necessity, be very slow. 



Reprinted from Tlie American Naturalist, September, 1897. 



