﻿16 P- J4 "' I Quart. Journ. Geol. Soc. Vol. LXI. PI. XXIX. 



| Range-Diagram of BrachiopoeJ)s in the Bristol Area. 



ZONES S' Cleistopora i Zaphrentis Syringothyris i S e m i n u 1 a Dibunophyllm 



SUBZONES E ' " "•'»/''<•"'" ■■Iiilirnl,; ,, „ v i„„i., /,,„ 



H ORIZONS] M \n K, | Kz H Z, | Zz M C |8| 1 S; S 2 Pi | D 2 



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