No. 5] REVISED SYSTEM. SURVEY OF THE MELOBESIEAE. 1 1 



Conceptacles of cystocarps superficial or slightl} 7 immersed, 

 conical or subconical, abruptly passing into a short, thin tip fre- 

 quently soon disappearing, with an apical pore; carpospores arising 

 from the peripherical portion of the „conjugation cell", the central 

 parts of the latter with a few elongated paranemata which soon 

 disappear. 



Subgen. i. Eulithothamnion Fosl. 1 ) 



Sect. I. Innatæ Fosl. 



Conceptacles of sporangia at length growing down into the frond. 

 1. L. glaciale Kjellra. 

 f. typica. 



f. verrucosa Fosl. (L. varians f. vermcosa Fosl. Norw. Lith.) 

 f.? flabellata (Rosenv.) Fosl. 

 Granii Fosl. (L. glaciale f.?) 

 boreale Fosl. 

 investiens Fosl. 

 f. genuina. 



f. torosa Fosl. (L. glaciale f. torosa Fosl. Norw. Lith.) 

 japonicum Fosl. 



colliculosum Fosl. (Norw. Lith. ex parte). 

 Battersii Fosl. 

 botrytoides Fosl. 

 9. (L. delapsum Fosl.) 

 10. L. Ungeri Kjellm. 



f. intermedia (Kjellm.) Fosl. 



f. nana Fosl. 



f. typica. 



f. flexuosa Fosl. 



f. divergens Fosl. (L. divergens Norw. Lith.) 



f. corymbiformis Fosl. 



f.? breviaxe Fosl. 



f.? fastigiata Fosl. 



f.? glomerata Fosl. 



2. 



L. 



o 

 o. 



L. 



4. 



L. 



5. 



L. 



6. 



L 



7. 



L. 



8. 



L. 



*) Lithoth. album and Lithoth. Esperii Heydr. excluded as too uncertain 

 spedes. 





