﻿SUPPLEMENT, PLATE XIII. 



Fig. 



1 — 3. Thecidium Boitchardii, Dav. Enlarged. 1. Perfect shell, showing the 



comparative size of the dorsal valve and the wavy 

 margin of the larger one, also the area and del- 

 tidinm. After a figure published by Mr. C. 

 Moore. Inferior Oolite, Dundry. Mr. C. Moore's 

 Collection. (P. 106.) 



4. „ var. (?). Enlarged. Upper Lias, Ilminster. Mr. 



C. Moore's Collection. 



5 — 9. „ omatum, Moore. Enlarged. 5. A perfect shell, from the 



Coral-rag, Lyneham. 6. Interior of the dorsal 

 valve. 7. Of the ventral valve. 8. Interior of 

 the dorsal valve. 9. Perfect shell. Mr. Moore's 

 Collection. (P. 104.) 



10. ,, rusticum (?). Enlarged. Dorsal valve. Upper Lias, Ilminster. 



Mr. C. Moore's Collection. (P. 107.) 



11, 12. „ sub-serratum, Tate. Enlarged. 11. Interior of dorsal valve. 



12. Perfect shell. Lower Lias, Brocastle. Mr. 

 C. Moore's Collection. (P. 107.) 



13. „ „ After Mr. R. Tate's figures, ' Geol. Mag.,' vol. vi, 



1869. Mr. R. Tate's Collection. 



14. ,, ? A very remarkable dorsal valve from the Inferior 



Oolite, Dundry. Mr. Moore's Collection. 



15. ,, ? A remarkable ventral valve from the Inferior Oolite, 



Dundry. Mr. Moore's Collection. 



16. \G a, b. ,, t pygmaum, Moore. Enlarged. Coral-rag. (P. 105.) 



1 7 — 19. Discina Hmvphriesiana, Sow. Perfect specimens from Trouville, Normandy ; 



here figured to complete the description of the 

 species, and taken from figures published by M, 

 E. Deslongchamps. (P. 81.) 



20. Spiriferina (?) Moorei, Dav. Upper Lias, Ilminster. Mr. Moore's Col- 



lection. (P. 103.) 



