PLATE I. 



{Fig. I from a Specimen lent by Mr. Howse, the rest from Schimper's work.) 



Fig. i. — Prothallium with young plant. 



„ 2. — Sf>h. cymbifolium. Vertical section of stem, passing also through two leaves 

 and the base of a branch fascicle. 



„ 3- — Ditto. Transverse section showing the pith or axile cells, the indurated peri- 

 pheral layer, and the four strata of cuticular cells. 



„ 4-— Cells of pith. Fig. 5. — Ditto of woody layer. FlG. 6.— Ditto of cuticle. 



„ 7. — Cells of a branch leaf of Sph. cymbifolium. 



„ 7-r. — Transverse section of a leaf of Sph. squarrosum. 



„ 8. — Cells of a branch leaf of Sph. acutifolium seen from the back. 



„ %x. — Transverse section of same. 



„ 9. — Male inflorescence of Sph. cymbifolium. FlG. 10. — Ripe antheridium with 

 paraphyses. 



., 1 1. — Vertical section of a capsule still enclosed in the calyptra. c, calyptra ; s, cavity 

 of spore sac ; p, pedicel of capsule. 



„ 12. — Macrospores. FlG. 13. — Microspores. 



