37 



edges. The length and the breadth of leaves measure 560-750 fi and 

 131-281 fi respectively. Their surface is composed of horizontally arranged 

 hexagonal cells of approximately equal length (34-38 //) and shows 7-11 

 cells in the widest row. The apices of " Langtriebe " are not inrolled, 

 but flat and straight ; the " Kurztriebe " are patent or almost horizontal, 

 at first curving towards the growing apex of the shoot afterwards becoming- 

 flat and straight. Pericentral cells are 9-10 in the main branches, 

 thoroughly ecorticated, with articulations half as long as broad. 



Fruits : Tetraspores are formed in the more lenear leaves, i.e. in the 

 " Kurztriebe," which contain 3 or 4 of them in a single longitudinal row in 

 lower articulations, and are externally covered by two or sometimes three cells. 

 Procarps are developed on either side but mostly on the outer side of the 

 leaves slightly beneath the apex. Cysticarps are oval with a rather wide 

 ostiole, provided with a more or less elongated turbinate pedicel, which has 

 mostly one or sometimes two wart-like or somewhat short spur-like pro- 

 minences on both sides near the base of the cystocarp. When two of 

 such prominences are present, one is smaller than the other ; but, one or 

 both may be sometimes entirely absent. Of the two prominences, the 

 one is transformed from the remnant of the apical portion of the original 

 leaf, and the other is of secondary formation. 



Remarks ; The characters of the plant being as just described, it 

 should, in spite of external resemblance arising from the obscurity of 

 dorso-ventral arrangement, be separated from Polyzonia ; for in Polyzonia 

 there is no regularity in the disposition of "Langtriebe," from which both 

 kinds of fruits are developed, while in the present plant they are formed 

 from ''Kurztriebe." It seems to me that the plant before us is related 

 to Herposiplionia subdisticha sp. nov., from which it differs however in 

 the form of " Kurztriebe." 



Kerposiphonia subdisticha Sp. nov. Fig. 12-14. 



Diagn. Frond filiform, subcylindrical, wholly decumbent, rooting 

 from undersmface, branched laterally into "Langtriebe" and "Kurz- 

 triebe." Both of these are subdistichously disposed on almost the same 

 plane, spreading out almost horizontally with straight apex. " Kurz- 

 triebe " generally incurved at the apical portion of the shoot, subcylindrical, 

 short, blunt at apex, and slightly constricted at base. Pericentral cells 11 

 in the mam branches, thoroughly ecorticated. Tetraspores 4 or 5 in one 

 row in somewhat expanded " Kurztriebe." 



