ANATOMY AND AFFINITY OF CERTAIN RARE AND PRIMITIVE FERNS. 395 
Fig. 13. Diagrammatic figures of fertile • pinnule to show venation and the inrolled margins. The 
sporangia are not indicated. ( x 4.) 
Fig. 14. Diagrammatic figure of portion of a fertile pinnule viewed from below. The sporangia are, with 
few exceptions, on the veins, and show a “ mixed” condition. ( x 20.) 
Fig. 15. Diagrammatic figure to show the arrangement of parts as seen in transverse section of fa fertile 
pinnule. ( x 40.) 
Figs. 16-22. Gymnogramme ( Trismeria ) trifoliaia, Desv. 
Fig. 16. A series of diagrammatic figures showing the distribution of tissues of stem cut transversely at 
consecutive levels. (x4.) 
Fig. 17. Diagrammatic figure of transverse section of base of petiole. ( x 8.) 
Fig. 18. A series of diagrammatic figures showing the distribution of leaf-trace tissues during departure of 
first pair of pinna-traces. ( x 8.) 
Fig. 19. Diagrammatic figures of transverse sections of rachis at point of union of the leaf -trace 
strands. ( x 8.) 
Fig. 20. A series of diagrammatic figures showing the distribution of leaf-trace tissues during departure of 
third pair of pinna-traces. ( x 8.) 
Fig. 21. A series of diagrammatic figures showing the distribution of tissues during departure of sixth pair 
of pinna-traces. ( 8.) 
Fig. 22. Diagrammatic figures showing the departure of a distal pinna-trace. (x8.) 
Figs. 23-27. Gymnogramme japonica, Desv. 
Fig. 23. A series of diagrammatic figures showing the distribution of tissues of stem cut transversely at 
consecutive levels. ( x 8.) 
Fig. 24. A series of diagrammatic figures showing the steps in stelar perforation. ( x 8.) 
Fig. 25. A series of diagrammatic figures showing the steps in condensation of the leaf-trace in the base 
of the petiole. ( x 6.) 
Fig. 26. Diagrammatic figures to show steps in reduction of the leaf-trace to a single strand. ( x 6.) 
Fig. 27. A series of diagrammatic figures showing the distribution of leaf-trace tissues during^departure of 
first pinna-trace. (x6.) 
Figs. 28-30. Gymnogramme ( Trismeria ) trifoliata, Desv. 
Fig. 28. Diagrammatic figure of pinnules. ( x 4.) 
Fig. 29. Diagrammatic figure of portion of a fertile pinna viewed from below. ( x 10.) 
Fig. 30 Diagrammatic figure to show the arrangement of parts as seen in transverse section of a fertile 
pinna. ( x 10.) 
DESCRIPTION OF FIGURES IN PLATES. 
Plate I. 
Jamesonia scalaris, Kze. 
Fig. 1. Dermal appendages of axis, consisting of glandular hairs and irregular sclerotic mounds. ( x 18.) 
Fig. 2. Photograph of a group of plants of Jamenonia scalaris, Kze., taken by Mr A. W. Hill, M.A., 
F.L.S., Assistant Director, Kew Gardens, at an altitude of 15,000 feet in the Andes of Peru. 
Fig. 3. Dermal appendages of leaf, consisting entirely of slender tortuous hairs. ( x 18.) 
Fig. 4. Reconstruction of vascular cylinder of a robust axis. ( x 10.) 
Fig. 5. Transverse section of axis, showing the typical construction at a level where two leaf-gaps over- 
lap. ( x 30.) 
Fig. 6. Reconstruction of stele at a forking of the axis. ( x 10.) 
TRANS. ROY. SOO. EDIN., VOL. LII. PART II (NO. 14). 
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