PLATE XVI. 



(All the figures are of natural size except figs. 16 6, 22 6, and 24 b, 



which are X 4(1.) 



Fig. 

 1. Peltoccuris aptychoides, Salter 



3. — 



4. — 



5. — 



6. 



7. 



8. 



9. 

 10. 

 11. 



23. 



24. 



anatina, Salter. 



(Page 114.) 



Museum. 



British Museum. (Page 113.) 

 British Museum. (Page 114.) 

 Distorted. Mus. Pract. Geol. 

 Mus. Pract. Geol. (Page 114.) 

 Narrowed by pressure. Cambridge 

 (Page 115.) 



— — Perfect. British Museum. (Page 115.) 



— — Mus. Geol. Surv. Scotland. (Page 115.) 



— — Coll. D. J. Brown. (Page 115.) 

 {aptychoides, Salter.) Young. Coll. D. J. Brown. (Page 114.) 

 patula, sp. nov. British Museum. (Page 116.) 



— — Widened by pressure. Coll. J. E. Marr 



bridge Museum. (Page 116.) 



Cam- 



12. Discinocaris Broivniana, H. Woodward. 



13. — — — 



14. — — — 



15. — — — 



16. — — — 



17. 



18. 

 19. 



20. 

 21. 



22. — 



ovalis, sp. nov. 

 Bro'wniana, H. 



Coll. D. J, 

 Woodward. 



Damaged. British Museum. (Page 

 119.) 



Squeezed. Mus. Geol. Surv. Scot- 

 land. (Page 120.) 



Squeezed. Mus. Geol. Surv. Scot- 

 land. (Page 120.) 



Widened by pressure. Coll. J. 

 Dairon. (Page 120.) 



a, convex cast, widened by pressure ; 

 b, interstitial ornament, enlarged 

 40 diam. Mus. Geol. Surv. Scot- 

 land. (Page 121.) 



Much widened by pressure. Cam- 

 bridge Museum. (Page 121.) 



Narrowed by pressure. Cambridge 

 Museum. (Page 121.) 



Narrowed and flattened by pressure. 

 Cambridge Museum. (Page 121.) 

 Brown. (Page 121.) 



Slightly distorted ; obscured at the 

 notch. Coll. Lapworth. (Page 

 121.) 



a, convex cast, widened ; b, inter- 

 stitial ornament, enlarged 40 

 diam. Coll. D. J. Brown. 

 (Page 121.) 



Distorted. Coll. D. J. Brown. 



— wndtdata, sp. nov. a. 



(Page 121.) 

 convex cast; b, interstitial 

 enlarged 40 diam. Coll. D. 

 (Page 122.) 



ornament, 

 J. Brown. 



