LIFE-ZONES IN THE RRITTSH CARRONIFEROI'S ROCKS. 



311 



Series 1-3 constitute what I consider to be the ' Upper Carboniferous,' 

 and series 4 and 5 the ' Lower Carboniferous,' of my paper on the Yorer 

 dp,le Series/ 



' Geol, Mag., April and May 1897. 



