127 



with some tendency to unilaterality. Ttie cells are cylindrical, not constricted at 

 the transverse walls, (7,5 — )9 — 11 ( — 12) « broad, 3 — 7, usually 4 — 5 diameters long. 

 They contain a parietal chromatophore with a large parietal pyrenoid much pro- 

 jecting into the interior of the cell. In the older cells the chromatophore is larger 

 than in the younger and perhaps somewhat lobed. Hyaline hairs do not occur. 

 The germination was unfortunately not observed. 



The sporangia are borne on branch- 

 lets, usually placed on the inner side of 

 the branches near their base, very often 

 two or three seriate. The branchlets 

 are as a rule one- or two-celled; in the 

 first case it bears a terminal and a la- 

 teral sporangium, in the latter the upper 

 cell behaves in the same way, while the 

 lower cell bears one or two sporangia. 

 It happens however that the branchlets 

 may consist of more than two cells and 

 that they may be branched (fig. 54 D). 

 Only rarely the sporangia may be ses- 

 sile directly on the filaments. The spor- 

 angia are always monosporous, oblong, 

 18 — 19/i long, 9 — 10,5// broad. Renewal 

 of the emptied sporangia from the under- 

 Ij'ing cell frequently occurs. 



As already said, the Danish spec- 

 imens agree with the original specimens 

 of De Notaris from Genoa. Ardissone 

 figures certainly only two single, appa- 

 rently sessile sporangia (1867 fig. 3); the 

 sporangia are however nearly always 

 borne on branchlets at least two together 

 in De Notaris specimens as well as in 

 mine. 



This species greatly resembles Ch. 

 corymbifera Thur.^, which grows on Hel- 

 minthocladia purpurea. It differs from 

 it by the absence of sex-organs and by 



the want of a larger cell originating from the germinating spore and giving ofT 

 erect filaments and descending endophytic filaments. In spite of repeated search I 

 have never found such a cell and that is in accordance with Hornet's statement 



Fig. 53. 



Chaiitransia Nemalionis. Erect filament with sporangia, below 

 an endophytic filament. 95:1. 



G. THUKtrr in Ln Joi.is Liste p. 107 ; Bohnet et Thuret, Not. alg. I p. 17 pi. V; Bornet 1904, p. XX. 



