Trans. Roy. Soc. Edin. 
Vol. LII. 
Dr John M'Lean Thompson on “The Anatomy and Affinity of certain Rare and Primitive Ferns.” Part II. — Plate II. 
Fig. 9. 
Fig. 10. 
Fig. 11, 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Fig. 22. 
J. M‘L. T. del. 
