﻿PLATE XXII. 



Tig. 

 1, 2. Tric/onia Linyonensis, Dum. Middle Lias, Eston Nab. (Page 98.) My 



cabinet. 



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



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



Lias. My cabinet. 



4. „ „ Internal Mould, Middle Lias ; Challoner Mine, neai- 



Guisborough. My cabinet. 



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



School of Mines. 



6. „ Iaviu»cula, Lye. Greensand, Collumpton. (Page 9(5.) Coll. Vicary. 



7. „ (ladalea,VaA. Young example. Greensand, Blackdown. (Page 100.) 



My cabinet. 



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



formation and locality. My cabinet. {T. quadmfa. Sow.) 



