Chap. III.] 
FOSSILS OF LLANDEILO AGE. 
51 
Silurian fossils Orthis calligramma and Diplograpsus pristis, two or three 
species of Lingula, and Ogygia Selwynii (the species characteristic of the 
beds on the west flank of the Stiper Stones), with other Trilobites, such as 
Asaphus affinis (M'Coy), a Trinucleus, and several new species, figured in 
the following woodcut (Foss. 10). 
Fossils (10). Fossils op Lower Llandeilo Eocks, North Wales. 
1. Ogygia scutatrix, Salter. 2. Angelina Sedgwickii, id. 3. A. Sedgwickii, laterally 
compressed. 4. Calymene parvifrons, id. 5. Homalonotus bisulcatus, id. 6. iEglina 
grandis, id. 7. Trinucleus Gibbsii, id. 8. Ogygia Selwynii, id. 9. Agnostus princeps, 
Salter. 10. Agnostus, n. sp.? 11. Lingulella Davisii, M' Coy, in a compressed form. 
12. Orthis calligramma, Dalm. 13. O. remota, Salter. 14. Theca vaginula, id. 15. Di- 
plograpsus pristis, Hisinger. 
Fossils (11). Characteristic Fossils op the Llandeilo Flags (Wales and Shropshire). 
1. Asaphus tyrannus, Murch. 2. Ogygia Buchii, Brongn. 3. O. Portlockii, Salter. 
4. Stygina Murchisonia?, Murch. 5. Agnostus Maccoyii, Salter. 6. Trinucleus fimbri- 
ate, Murch. 7. T. Lloydii, id. 8. T. concentricus, Eat., var. d. 9. Calymene brevica- 
pitata, Portl. 10. C. duplicata, Murch. 10*. Beyrichia complicata, Salter. 11. Grap- 
tolithus Beckii, Barr. 12. G. tenuis, Portl. 13. Didymograpsus Murchisonii, Beck. 
14. Diplograpsus? teretiusculus, His. 15. Orthis alata, Sow. 16. O. striatula, Emmons. 
17. Siphonotreta micula, M'Coy. 18. Lingula attenuata, Sow. 19. L. granulata, Phill. 
20. L. Eamsayi, Salter. 21. Theca reversa, id. 22. Monticulipora favulosa, Phill. 
E 2 
