﻿PLATE X. 



Figs. 1 — 5. Lagena Howchiniana, nov. (Page 121.) 



Figs. 1 — 3. Lateral aspect. Magnified 50 diameters. 

 Fig. 4. Double specimen. X 50 diam. 

 Fig. 5. Vertical section. X 50 diam. — All Carboniferous. 

 Figs. 6 — 16. Nodosaria radicula (Linne), and its Permian varieties. (Page 124.) 

 Fig. G. Typical form, after Reuss (N. Geinitzi, Rss.). 



Figs. 7, 8. Typical form in matrix of weathered Magnesian Limestone. X 50 diam. 

 Fig. 9. Transparent longitudinal section of the same. X 50 diam. 

 Fig. 10. Nodosaria Kirkbyi, Richter, from an original drawing by Dr. R. Richter. 

 Fig. 11. — — copied from Geinitz's " Dyas." x 15 diam. 



Fig. 12. — Kingi, Reuss, ditto. x 10 diam. 



Fig. 13. — Jonesi, Richter, ditto. x 20 diam. 



Fig. 14. — conferta, Schmid, copied from Dr. Schmid's figure. 

 Fig. 15. — ovalis, Schmid, ditto. 

 Fig. 16. — citriformis, Schmid, ditto. 

 Figs. 17, 18. Dentalina communis, d' Orbigny. (Page 127.) 



Fig. 17. From Prof. T. Rupert Jones's figure in King's Monograph, x 30 diam. 

 Fig. 18. Specimen in the matrix after Dr. Schmid. 



Permian and Zechstein specimens. 



Figs. 19. Dentalina multicostata, d' Orbigny. (Page 129.) 



After Jones, in King's Monograph. Permian, x 30 diam. 

 Figs. 20 — 22. Textularia Jonesi, Brady. (Page 133.) 



Fig. 20. Specimen from the Permian at Summerhouse, Durham. x 50 diam. 

 Figs. 21, 22. From original drawings by Dr. R. Richter, from Middle Zechstein specimens. 

 X 25 diam. 



The Permian Textularice, whether English or German, are very commonly found partially or entirely 

 split horizontally, so showing the interior. 



Fig. 23. Textularia multilocularis, Reuss. (Page 135.) 



Zechstein specimen; copied from Prof. Reuss's figure in Geinitz's "Dyas." 



Figs. 24, 25. Textularia triticum, Jones. (Page 134.) 



Fig. 24. After Jones in King's Monograph. X 25 diam. 



Fig. 25. From an original drawing by Dr. R. Geinitz. X 25 diam. 



Permian and Zechstein specimens. 



Fig. 26. Textularia gibbosa, d' Orbigny. (Page 131.) 



a. Lateral aspect, b. Superior end-view. Carboniferous specimen. X 30 diam, 



Figs. 27 — 29. Textularia eximia, d'Mchwald. (Page 132.) 



Fig. 27b. Superior end-view. — All Carboniferous specimens. x 30 diam. 



Figs. 30, 31. Bigenerina patula, nov. (Page 136.) 

 Fig. 30. Lateral aspect, x 30 diam. 



Fig. 31. Broken specimen showing labyrinthic interior structure. X bO diam. 

 Carboniferous specimens (see also PI. VIII, figs 10, 11). 



