﻿PLATE VI. 



Fig. 



1, a, b. Trigonia triquetra, Seebach. Calcareous Grit, Cuninor, Oxfordshire. (Page 26.) 



2, „ „ Lower Calcareous Grit, Filey Point, Yorkshire. Specimen 



with fewer and larger tiiberculated varices. 



3, 4. „ Phillipsii, Mor. and Lye. Inferior Oolite, Appleby, Lincolnshire. 



(Page 38.) 



5 a. „ imbricata, Sow. Great Oolite, Bath. (Page 33.) 



5 b. „ „ The same specimen magnified. 



6. „ Bamsayi, Wright. Supra-Liassic Sands, Frocester Hill, Gloucester- 



shire. (Page 49.) 



