376 ME. AETHUE JOHN MASLEN ON THE 



of the inner cortex; x., xylem of the leaf-trace; p., tissue between xylem and phloem; 



jo'., elongated cells of phloem; Fa., parichnos ; i.r., intruded Stigmarian (?) rootlets. 



C.N. 1613. X 50. 

 Fig. 8. Longitudinal section of cells of outer cortex. C.N. 1613. X about 180. 

 Fiff. 9. Transverse section of cells of outer cortex. S. 85. 

 Fig. 10. Radial section of periphery of cone and proximal end of a sporophyll to show the origin of the 



parichnos space from the middle cortex. i.e., inner cortex; m.c, middle cortical space; 



O.C., outer cortex ; l.t., leaf-trace (accidentally broken across) ; l.V ., leaf -trace just leaving 



inner cortex ; Pa., parichnos space. C.N. 1613. X 23. 

 Fig. 11. Longitudinal section of leaf -trace (sporophyll) bundle in the middle cortical space, i.c.sk., 



i.c.sh\, sheath continuous Tvith inner cortex; a?., xylem ;/>., elongated cells between xylem 



and phloem; /., phloem. C.N. 1613. x 180. 

 Fig. 12. Transverse section of leaf-trace (sporophyll) bundle in the middle cortical space, i.c.sh., sheath 



continuous with inner cortex ; x., xylem ; p., remains of cells between xylem and phloem ; 



p',, phloem space. C.N. 1613^. X 150. 



Plate XXXVII. 



Lepidostrobus oldhamius (a) continued. 



Pig. 13. Enlarged drawing of the leaf-trace bundle from fig. 7. sh. and sh'., sheath of cells con- 

 tinuous with those of the inner cortex: x., xylem ; p., tissue between xylem and phloem; 

 p'., phloem ; Pa., parichnos space ; c, cortex. C.N. 1613. x about 160. 



Fig. 14, Eadial section through a leaf-trace bundle in the outer cortex just as it is bending out to pass 

 into the sporophyll. x., xylem ; p., cells between xylem and phloem ; p'., phloem. C.N. 1613. 

 X about 160. 



Fig. 15. Tangential section through the outer cortex, with an emerging leaf-trace bundle, sh. and sh., 

 sheath of cells surrounding the bundle and continuous with the inner cortex ; x., xylem ; 

 p., tissue between xylem and phloem ; p ., phloem ; Pa., parichnos space ; o.c, outer cortex. 

 C.N. 572. X about 150. 



Fig. 10. Transverse section of one of the larger ascending sporophyll-laminse from the periphery of the 

 cone. /.^., the trace. C.N. 1613 c?. x about 30. 



Fig. 17. Enlarged drawing of the thin edge of a leaf similar to fig. 16, showing a distinct epidermis, e. 

 S. 85. 



Fig. 18. The vascular bundle from fig. 16. x., xylem; y., phloem; s./., short tracheides. C.N. 1613 </. 

 X 120. 



Fig. 19. Two smaller leaves from the same slide as fig. 11. C.N. 1613 d. x about 30. 



Fig. 20. The vascular bundle from /./., fig. 19. x., xylem; s.t., short tracheides- C.N, 1613 </. 

 X about 160. 



Lepidostrobus oldhamius (y). 



Fig. 21. Transverse section of the axis of the cone, x., xylem cylinder; /./., leaf-trace bundles; 



Pa., pariclinos space; p., pedicel; sp., remains of sporangia. S. 610. x 15. 

 Fig. 22. Diagram illustrating the general morphology of the cone of Lepidostrobus oldhamius. a., axis 



of strobilus; b., sporophylls and sporangia; x., xylem and medulla; i.e., inner cortex; 



m.c, middle cortex; o.c, outer cortex; p., pedicel of sporophyll; la., lamina of sporophyll; 



li., ligule; l.t., bundle; Pa., parichncs; sp.w., wall of sporangium. X 4. 



