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EXPLANATION OF PLATES LXXIII AND LXXIV. 
Illustrating Mr. Holden’s paper 'on Wound Reactions in Filicinean Petioles. 
PLATE LXXIII. 
Fig. 1. Polystichum proliferum. Curled apex in transverse section, showing formation of a 
complete wall of cambiform tissue, x 250. 
Fig. 2. P. proliferu??i (young). Curled apex in transverse section, showing elongation of the 
outer cortical cells, and occasional transverse divisions. Slightly diagrammatic, x 250. 
Fig. 3. Lastraea Filix-mas. Curled apex in transverse section, showing elongation and division 
of the cortical cells. Slightly diagrammatic, x 250. 
Fig. 4. Polystichum angulare. Curled apex, showing elongation of outermost cortical cells 
only, without division. Slightly diagrammatic, x 250. 
Fig. 5. Asplenium hulhiferum. Transverse section of petiole just below curled apex, x 250. 
Fig. 6. A. bulbiferum. Transverse section of petiole in region of pinna-insertion, x 250. 
Fig. 7. Lastraea Filix-mas. Transverse section of petiole in region of pinna-insertion. One side 
shows cell-contents, the other the elongation and division of the cortical cells and the thickening of 
the walls, x 250. 
