PLATE XV. 



Fig. 

 1. Trigonia v.-cosfata, Lye. Inferior Oolite, Rodborough Hill, Stroud. (P;ige GO.) 



Coll. Royal School of Mines. 



~, 'i, 4'- ,, ,, Smaller examples, Liferior Oolite, Dogger, Blue AVyke, 



Yorkshire. 



5, 6, 7. ,, cowpfu, Lye. Liferior Oolite, Collyweston slate. (Page 70.) 



S, 10. „ costatula, Lye. Liferior Oolite, near Stroud. (Page 81.) Coll. Royal 



School of Mines. 



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



IL „ S/iarpiana, Lye. Inferior Oolite (ferruginous), near Northampton. 



(Page 79.) 



