Salterton are of Devonian age ; and I am glad to be able to add that, after having examined my drawings and heard my views, Mr. Salter had, both by word and letter, frankly admitted having been mistaken when he referred all the fossiliferous pebbles at Budleigh to the Lower- Silurian period*.
Silurian Species (according to Rouault and Salter).
1. Lingula Lesueuri (Rouault). Not very rare. 2. — Rouaulti (Salter). Not very rare. 3. Hawkei (Rouault). Not very rare.
Species of which the age is not certain ; all occur in the same rock.
4. Orthis redux (Barr.?), var. budleighensis (Dav.). Very abundant. 5. — Valpyana (Dav.). Not very rare. 6. — Vicaryi (Dav.). Not common. 7. — Berthoisi, Rouault?, var. erratica (Dav.). Not very rare. 8. Spirifera octoplicata (Sow.), or S. elevata (Dalm.)? Not common. 9. Rhynchonella? ovalis, Dav. Not common. 10. Terebratula ?. sp. ? Very rare. 11. Strophomena, sp. ? Rare.
Devonian Species.
12. Spirifera Verneuilii (Murch.). Very common. 13. — macroptera, var. microptera (Goldf.). Rare. 14. Athyris budleighensis (Dav.). Rare. 15. Atrypa, sp. (perhaps reticularis). Rare. 16. Rhynchonella inaurita (Sandb.). Very abundant. 17. — elliptica (Schnurr?). Rare. 18. — Vicaryi, Dav. Not common. 19. — , sp. ? Rare. 20. — , sp. ? Rare. 21. Streptorhynchus crenistria (Phil.). Rare. 22. Productus Vicaryi (Salter). Common. 23. Chonetes, sp. Rare.
Species presenting a Devonian fades, but whose positive age cannot yet be correctly decided.
24. Lingula? Salteri (Dav.). Not common. 25. Discina Vicaryi (Dav.). Not common. 26. — incerta (Dav.). Rare. 27. — ? Edgelli (Dav.). Rare. 28. Crania transversa (Dav.). Rare.
- In a very interesting memoir " On the Lower Silurian formations in the
Department of the Manche in France " (Memoires de la Soc. Imp. des Sciences de Cherbourg, vol. ix. 1863), M. Bonissent notices beds of Red Sandstone, or quartzite, which in many localities, carefully described by him, contain Orthis redux, O. Berthoisi, O. Davidsi, O. Damjoui, and a large undescribed species of the same genus associated with Calymene Tristani, Dalmanites socialis, &c. These sandstones are considered by him to be equivalents of the Gres de May, near Caen, in Normandy. The O. redux occurs in the Department of the Manche, and not far from Cherbourg, both in quartzites and in schists which the author refers to the "faune seconde" of Barrande, or stage of the schists of Angers. If, consequently, our little Budleigh species agrees specifically with the form so named by M. Bonissent, the eight species occurring along with it in the same rock or pebble at Budleigh Salterton, will have to be considered Silurian. M. Bonissent mentions likewise the presence of Lingula resembling L. Lesueuri in some of the sandstone beds of the same Department.
