﻿PLATE XVI. 

 Fig. 



1. Trif/o7na Leckenhyi, Lye. Supra-Liassic Sandstone, Robin Hood's Bay, Yorkshire. 



(Page7L) Coll. VVoodwardian Miiseuna, Cambridge. 



2. „ „ A smaller specimen, from the same formation and locality. 



3. „ Skarjnana. Dogger, Blue Wyke. (Page 79.) 



4. 5, 6. ,, „ Same species (ferruginous). Liferior Oolite, Northamptonshire. 



7. ,, paucicosta, Lye. Kelloway Rock, Cayton Bay, near Scarborough. 



(Page 57.) 



8. „ Williamsoni, Lye. Kelloway Rock, Cayton Bay, near Scarborough. 



(Page 53.) 



9. 10, IL umhdata, From. Great Oolite, near Bourn, Lincolnshire. (Page 77.) 



