PLATE XIII. 



{Miocene of Kattywar.) 



Figure 1. Cidaris depbessa, Duncan and Sladen (page 80). The test, natural size. 



2. Ambulacral plates, magnified. 



3. Diagram across an ambulacral plate. 



4. Cidaris granulata, Duncan and Sladen (page 80). The test, natural size. 



5. Ambulacral plates, magnified. 



6. A coronal interradial plate, showing the radial granulation and the markings on 



the boss and partial crenulation, 



7. Grammechinus regularis, Duncan and Sladen (page 82). The actinal A'iew, 



natural size. 



8. Ambulacral and coronal plates, magnified. 



9. Temnechinus costatus, d'Archiac, sp. (page 84). A large specimen, side view. 



10. An ambulacrum and part of an interradium, magnified. 



11. Temnechinus apfjnis, Duncan and Sladen (page 86). The test, natural size. 

 15. An ambulacrum and part of an interradium, magnified. 



13. Temnechinus Rousseaxji, d'Archiac (page 84). A large specimen, diagram of side 



outline. 



14. A depressed type, side view. 



15. An interradial plate, showing unusual tuberculation and crenulation. 



16. Temnechinus tubbrculosus, d'Archiac (page 85). Ambulacrum and part of 



interradium, magnified. 



17. Diagram of shape, natural size. 



