SUPPLEMENT, PLATE XLI. 



SILURIAN. 



Fig. 



1 — 9. OrtMs Berthosi, var. erraticn, Dav. Interior of both valves natural size. 



Coll. Rev. H. Winwood and Mr. Vicary. 

 4. Prom Museum of Practical Geology. 

 7. Internal cast of ventral valve. 8. In- 

 ternal cast of dorsal valve. 8 a. Interior 

 of dorsal valve. 8 b. Portion of the same 

 enlarged. 9. Natural size of ventral valve. 

 7, 8, 9. Museum of Practical Geology. 

 All from Budleigh-Salterton. (P. 356.) 



10, 11. „ pulvinata, Salter, sp. 10. Exterior. 11. Interior of dorsal valve after 



Mr. Salter's figure in Quarterly Journal 

 Geol. Soc. 11 «. Internal cast enlarged; 

 interior of same valves enlarged. Bud- 

 leigh-Salterton. Collection of Mr. Vicary. 

 (P. 357.) 



12 — 20. „ Budleighensis, Dav. 12. Group of internal casts and external impres- 



sions ; nat. size. 13 — 17. Different forms, 

 dorsal and ventral valves, of same species, 

 nat. size, from the Museum of Practical 

 Geology and the collections of the Rev. H. 

 Winwood and Mr. Vicary. 16 a. Exterior 

 much enlarged. 18. Internal cast of 

 ventral valve. 20. Internal cast of dorsal 

 valve ; interior of same valve much en- 

 larged. Woodwardian Museum, Cam- 

 bridge. All from Budleigh-Salterton. 

 (P. 358.) 



21, 22. „ Valpyana, Dav. 21, 21 a. Exterior of both valves. 22. Internal cast 



of ventral valve. Budleigh-Salterton. 

 Collection of Mr. Vicary. (P. 361.) 



23. Terebratula? sp. Budleigh-Salterton. Collection of Mr. Vicary. (P. 354.) 



