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. 6. 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, cV OrUgny. (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'Orligny. (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. 



Pigs. 21, 22. From original drawings by Dr. R. llichter, from Middle Zechstein specimens. 



X 25 diam. 



The Permian Textulariee, 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, iVOrbigny. (Page 131.) 



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

 Figs. 27 29. TEXTULARIA EXIMIA, d'Eichwald. (Page 132.) 



Fig. 27&. Superior end-view. All Carboniferous specimens, x 30 diam. 

 Figs. 30, 31. BIGENERINA PATULA, nov. (Page 136.) 



Fig. 30. Lateral aspect, x 30 diara. 



Fig. 31. Broken specimen showing labyrinthic interior structure, x 30 diam. 

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



