352 



HEPATICJC. 



4. Do. Transverse of an entire frond. These figures 

 shew that the cavity of the frond contained between the upper 

 and lower cutis are subdivided by cellular septa, in which no 

 vesicles containing globuline are developed. 



5. Root. 



6. Stoma viewed from above. 



7. Stoma from the base of a frond. 



8. 9. Stomata viewed from above, and on their inner sur- 

 face. 



10. A cell from the upper cut is detached with its enclosed 

 green globules. In this I could not detect any membranous 

 covering enclosing the green globules," which are chiefly com- 

 posed of an aggregation of greenish active molculae. 



1 1 . Portion of lower cuticle. 



PI. LXIX. C. 



The plant from which these drawings) illustrative of the 

 Mirbels description of Marchantia were made,) occurs in 

 abundance on the walls of an old Pagoda at Mergue. I have 

 never seen it in fructification. It is evidently a Marchan- 

 tiaceous genus, although most probably not a Marchantia. 

 The apertures are of immense size, and are easily visible with 

 a common lense. 



The correspondence of the apertures with the divisions 

 marked on the external surface of the frond is pretty con- 

 stant. It has a distinct cuticle ; on the inferior surface of 

 which no large vesicles containing parenchyma (globuline) are 

 developed. 



Calcutta, Botanical Garden, July 22, 1835. 



