PLATE XLV. 



Fossil Charophyta. 



Figs. 1-10 Glavator Reidii J. Groves from Middle Purbeck Beds 

 of Dorsetshire. (Reprinted, except 2, 4 and 5, by kind permis- 

 sion of the Royal Society, from its ' Proceedings ' B, vol. 89, 

 1916.) 



PIG. 



1. Nearly axial section through stem-node with much enlarged 

 cells, showing also bases of spreading branchlets and 

 traces of groups of small club-shaped outgrowths. 

 2, 3. Transverse sections of stems, showing condition of cortex 

 in the internodes, when primary and secondary cortical- 

 cells are of nearly equal diameter. 



4. Oblique section of stem below node, the primary cortical- 



cells of which have begun to increase in diameter. 



5. Transverse section of stem, quite close to the node, showing 



very much enlarged primary cortical-cells, the secondary 

 cells retaining their original diameter and being forced 

 outwards. 



6. Portion of stem showing groups of club-shaped processes. 



7. Nearly axial section of swollen node, thought to be at the 



apex of the stem, the branchlets apparently growing 

 nearly upright. 



8. Three " fruits " attached to branchlet showing exterior of 



utricles. 



9. Transverse section of " fruit " showing portions of supposed 



adnate bract-processes. 

 10. Utricle seen from above with section of apex. 



Figs. 11-19. Fossil fruits from the Lower Headon Beds of 

 Hordle Cliffs, S. Hants. (Reprinted, except 17 and 19, by kind 

 permission of the Geological Society, from its ' Quarterly 

 Journal,' vol. 77, iii, 1921.) 



via. 

 11, 12. Chara ccelata Reid & Groves. 

 13, 14. C. Wrightii Salter. 



15. C. vasiformis R. & G. 



16. G. strobilocarpa R. & G. 



17. C. polita R. & G. 



18. G. helicteres Brongn. 



19. Tolypella headonensis R. & G. 



All the figures are reproduced from photographs by Clement 

 Reid. Fig. 8 X 40, the rest X 20. 



