﻿PLATE XIV. 



Fig. 

 1, I, a, 2, 3, 4. Tri^onia literuta. Young and Bird. Upper Lias, Robin Hood's Bay, 



Yorkshire. (Page 64.) 



5, 6. „ u/ii/ulata, Sow. Inferior Oolite, Rodborough Hill, Stroud. 



(Page 54.) 



7, 8, 9, 10. „ Jlc'cta, Lye. Cornbrash or Forest Marble, Thornholuie, 



Appleby, Lincolnshire. (Page 55.) 



