68 



Dr. Wheelion Mind — Carboniferous Life-Zones. 



Series 1-3 constitute what I consit^er to be the " Upper Carbon- 

 iferous," and series 4 and 5 the " Lower Carboniferous," of my 

 paper on the Yoredale Series (Geol. Mag., April and May, 1897). 



"While the zone oi Froduetus giganteus corresponds to the Viseen of 

 Eelgium, the lower zones of Great Britain do not resemble the 



