230 Mr. D. Sharpe and Mr. Salter on Fossils from South Africa. 



Fig. 20. Ophiocrinus Stangeri, Salter; p. 223 ; enlarged to twice the size : the line indicates 

 the natural length : at a, some of the wedge-shaped arm-joints are magnified. 



Figs. 21-28. Various stems of Encrinites, very characteristic of these strata, p. 223. They 

 appear to be allied to those of Rhodocrinus. From the Warm Bokkeveld and 

 Kokman's Kloof. 



Plate XXVI. 



Figs. 1, 2, & 5. Spirifer Antarcticus, Morris and Sharpe. p. 206, 



1. Dorsal valve, interior. 



2. Ventral valve, interior. 



5. Dorsal valve, exterior. 



Figs. 3, 4, & 6. Spirifer Orbignii, Morris and Sharpe. p. 207. 



3. Dorsal valve, interior. 



4. Ventral valve, interior. 



6. Ventral valve, exterior. 



Figs. 7-10. Orthis palmata, Morris and Sharpe, sp. p. 20/. 



7. Ventral valve, exterior. 



8. Dorsal valve, exterior. 



9. Ventral valve, interior. 



10. Dorsal valve, interior. 



Figs. 11 & 12. Terebratula Bainii, Sharpe. p. 208. 



11. Ventral valve, exterior. 

 12 a. Ventral valve, interior. 

 \2b. Dorsal valve, exterior. 



Figs. 13 & 17. Strophomena Bainii, Sharpe. p. 208. 

 13. Ventral valve, exterior. 



17. Dorsal ? valve, exterior. 



Figs. 14, 15, & 16. Chonetes, undetermined, p. 209. 



Figs. 18 & 19. Strophomena Sulivani, Morris and Sharpe, sp. p. 209. 



18. Ventral valve. 



19. Dorsal valve. 



Figs. 20-23. Orbicula Bainii, Sharpe. p. 210. 



20 c & 20 b. Upper valve of a small specimen. 



20 c. Part of the surface of 20 a, magnified. 



21 « & 21 b. Upper valve of a large specimen, which has lost nearly the whole of the shell. 



22. Lower valve. 



23. Fragment of upper valve, with the shell well preserved. 



Plate XXVII. 



Fig. 1. Solenella antiqua, Sharpe. p. 210. 

 1 a. Right valve. 

 I b. Hinge of 1 a. 



