RICCIA. 



347 



la. Sporula brunnea convexo-trigona, tunica potius mem- 

 brana quam maxinie externa, in cons pic ua, arete adhserenti 

 membraiue internae brunnea, sublentem centies augentem 

 vestigia compositionis non ostendens : membrana interna sub 

 hyalina. 



Hab. In humidis prope Negrogam regionis Assamicai alta?, 

 saspe cum priori consociata. 



Frondes humifusse, teneriores et aspectu magis membrana- 

 ceee quam in precedente, lobi dichotoma pinnatifida, laciniis 

 spathulatis apice emarginatis ; pagina supera plana, infera 

 hinc illinc ob capsulas prcmiinulas gibba. Cuticuia prorsus 

 nulla. 



Capsular fere prsecedentis seel pauciores, secus loborum cen- 

 trum crassiores dispositae, per paginam inferam erumpentes, 

 ad epocum maturitatis partialiter fere denudatcje ; cellule 

 fibrosae. 



Membrana interior nulla. 



Sporula rotundato-angulata, brunnea tunica sub lentem 

 centies augentem cellulis minutis areolata ideoque composita. 



Riccia PI. LXXV. F. Fig. I. 



1. Long section of a lobe of frond. 



2. Young capsule. 



3. Nearly mature do. 



4. Style, the process dipping down, doubtful. 



5. Portion of capsule \ ^ ^ 

 (5. Portion of contents j no ' 

 7- Young sporula. 



8. Nearly perfect do. 



9. Perfect sporula of Riccia no. 2. 



10. Portion of upper surface of frond. 



11. Do. do. shewing the obsolete cuticle. 



12. Portion of male frond. 



13. Long section of do. 



14. Anther in situ. \ , , -, , . 



15. Do. removed. j before d ^cence. 



