﻿PLATE XXII. 



Fig. 



1, 2. Trigonia Linyonemis, Dum. Middle Lias, Eston Nab. (Page 98.) My 



cabinet. 



1 a. „ „ Area and escutcheon of the specimen fig. 1. 



3. Small specimen. Hob Hill Mine, near Saltburn, Middle 



Lias. My cabinet. 



4. „ Internal Mould, Middle Lias ; Challoner Mine, near 



Guisborough. My cabinet. 



5. 5 a. „ excentrica, Sow. Greensand, Blackdown. (Page 94.) Coll. Royal 



School of Mines. 



6. „ laviuscula, Lyc. Greensand, Collumpton. (Page 96.) Coll. Vicary. 



7. dcedalea, Park. Young example. Greensand, Blackdown. (Page 100.) 



My cabinet. 



8. „ „ A very young example, slightly magnified, from the same 



formation and locality. My cabinet. (T. quadrata, Sow.) 



