MARCH ANT I A . 329 



15. Long, section of young capsule exposing the inner sac- 

 culus. 



16. Elaters and sporula of do. 



17- Young pistillum not fecundated. 



18. Do. do. soon after fecundation. 



19. Do. do. long section. Inner sacculus exposed. 



20. Portion of contents of do. 



21. Portion of a scale of the under cutis of the receptacle, 

 shewing that the marginal cells occasionally become 

 elongated into radicles. 



Marchantia Polymorphia. 



Female frond PI. LXIX. Fig. II. Banks Otipore. Immature. 



1. Marchantia (Grimaldia ?) female head, under surface. 



2. j, ditto longitudinal section. 



3. Group of female flowers and scales detached. 



4. One of these scales. 



5. 5, 5, 5. Female flowers at various stages, one shews the 



usual tendency to red colour so prevalent in the scales 

 of this tribe. 



6. Pistillum and included sac, (ovulum) containing nothing 

 but grumous matter. 



7. 7. Stomata of frond, representing their invariable appear- 



ance, one is partially opened from pressure. 



8. Portion of upper surface of frond, shewing the limi- 

 tation of one stoma to one areola : the stomata ought to 

 be represented of brown colour, and quite opaque. 



Marchantia polymorphia PI. LXIX. A. Fig. I. 



Male frond PI. LXIX A. Fig. I. Otipore April 25th 1840. 



1. Apex of a lobe of a frond shewing the disposition form 

 etc of the scales. 



2. Transverse section of do., J only represented. 



3. Section of transverse male peduncle. 



4. „ of female, shewing the perfection of this in hav- 

 ing stomata etc. 



u 2 



