1 48 Barber . — On the Structure of Pachytheca < 
DESCRIPTION OF FIGURES IN PLATE IX. 
Illustrating Mr. C. A. Barber’s paper on the structure of Pachytheca. 
Figs. 1-7 are drawn from sections in the possession of Sir Joseph Hooker, made 
from specimens obtained in the Wenlock Limestone. By transmitted light. 
Figs. 8-14 are drawn by reflected light from carbonised or pyritised specimens 
obtained in transition sandstones. 
Fig. 1. Slide 1. Section of Pachytheca magnified; Fig. 1 a natural size. 
Fig. 2. Portion more highly magnified. 
Fig. 3. Portion of cortex highly magnified. 
Fig. 4. Portion of cortex showing branching filament. 
Fig. 5. Portion of centre. 
Fig. 6. Portion of zone of oval bodies : Figs. 3, 5, 6 about the same en- 
largement. 
Fig. 7. Slide 2. Portion of zone of oval bodies. 
Figs. 8, 8 a . Pachytheca natural size from Forge Bridge and Onibury. 
Fig. 9. Pachytheca broken in half, magnified. 
Fig. 10. Pachytheca and ‘wood,’ probably Nematophycus , natural size. 
Fig. 11. The same specimen magnified. 
Fig. 11 A. Outer, and Fig. 11 B, Inner endings of filaments more highly 
magnified. 
Fig. 12. Free surface of Pachytheca , magnified, showing endings of radiating 
fibres. 
Fig. 13. Section of Pachytheca ground on a wrought-iron plate. 
Fig. 14. Pachytheca-like bodies occurring in rows, x 2. 
