484 EXPLANATION OE THE FIGURES. 



FIG. 



26. Longitudinal section of the apex of a very young stipule, x 400. 



27. Same section of a half-developed stipule, X 200. 



28. Outline of a slightly more developed stipule, seen from the surface, 



x 100. 



29. Longitudinal section of the growing apex of a young fruit-brancli, X 350. 



Figs. 30, 31. Selaginella spinulosa. 



30. Rudiment of a fruit in longitudinal section, x 30. 

 30*. Young macrospore. 



31. Young macrospore. 



PLATE LVI. 

 Figs. 1 9, 11 and 12. Selaginella Galeottii ; 10. Selaginella Martensi. 



1. End of a shoot bearing only leaves ; seen in longitudinal section of the 



wide side (obtained by adjusting the microscope to the longitudinal 

 axis), x 400. 



1*. The same, seen from outside. 



l c . The same, seen from outside the narrow side. 



2. Oblique view from above of the end of a shoot, x 400. 



3. Longitudinal section of terminal bud parallel to the wide side, x 400. 



4. Apex of the same seen from above, x 400. 



5. Middle of the fore-edge of a young superior leaf, x 300. 



6. Tip of a somewhat more developed inferior leaf, x 600. 



7. Fragment of the lateral margin of a perfect inferior leaf, X 300. 



8. Fragment of the same, nearer to the mid-rib. 



9. A very young stipule seen from the surface, x 500. 



10. Adventitious shoot of S. Martemi, produced by a fragment of a stem bitten 



off by wood-lice, x 10. 



11. Half of a longitudinal section of a very vigorous shoot of S. Galeottii, 



passing through the median lines of two opposite rows of superior and 

 inferior leaves (the former are to the right in the figure), x 200. 



12. Portion of a similar specimen, x 200. 



PLATE LVII. 

 Figs. 1 12. Selaginella Martemi. 



1 



Mother-cell of large spores, with some of its abortive sister-cells, X 300. 



2. A similar mother-cell. 



3. Mother-cell of large spores, in which, near the large vanishing primary 



nucleus, four daughter-nuclei are formed (three only of the latter are 

 visible), x 300. 



