PLATE II. 



Proetds batillus, Whidbome. (Page 20.) 

 Fig. 



1. Free cheek, including cheek-spine, of a very large specimen. Lummaton. 



My Collection. 



2. Pygidium ; 2 a, enlarged; 2 b, border at posterior extremity much enlarged. 



Lummaton. My Collection. 



3. Pygidium ; 3 a, side view. Lummaton. Torquay Museum. 



4. Head. An enlarged restoration from several specimens from Lummaton. 



Proetus audax, Whidbome. (Page 25.) 



5. 6. Pygidia; 6 a, side view. Lummaton. My Collection. 



7. Pygidium retaining outer test and showing tubercles in the axis. Lummaton. 



My Collection. 



8. Glabella retaining test ; 8 a, side view. Lummaton. My Collection. 



9. Glabella of a rather more elongate specimen ; 9 a, side view. Lummaton. 



My Collection. 



10. Free cheek, including eye. Lummaton. My Collection. 



Proetus subfrontalis, Whidbome. (Page 22.) 



11. Glabella. Lummaton ? Torquay Museum. 



12. Glabella and distorted portion of cheek. Lummaton. My Collection. 



Proetus Champernowni, n. sp. (Page 23.) 



13. Portion of pygidium. Lummaton. Woodwardian Museum. 



14. Portion of pygidium. Lummaton. My Collection. 



Dechenella setosa, Whidbome. (Page 27.) 



15. Head, partially retaining test. Chircombe Bridge. Vicary Collection. 



16. Pygidium; 16 a, portion of the border of the same specimen enlarged. 



Chircombe Bridge. Museum of Practical Geology. 



17. Pygidium of the largest specimen known ; 17 a, side view. Chircombe Bridge. 



Vicary Collection. 



Ctphaspis ocellata, Whidbome. (Page 17.) 



18. An enlarged restoration from several specimens from Lummaton. 



Harpes macrocephalus, Gold/. (Page 30.) 



19. Head, partially preserving test ; 19 a, side view. Lummaton. My Collection. 



20. Head of another specimen, also slightly distorted, wanting test. Lummaton. 



My Collection. 



21. Portion of the cheek of another specimen, enlarged to show structure; the 



outer coat of the test is absent. Lummaton. My Collection. 



22. Cheek-spine of another specimen, side view ; the surface is absent except at 



the extremity. Lummaton. My Collection. 



23. Pygidium, enlarged four diameters. Lummaton. Lee Collection, Brit. Mus. 



