132 



/ - 



the cuticle of the liosl (lig. 5(S C, E). But longitudinal filaments running a short dis- 

 tance from the surface between the pericentral cells also occur, and these filaments 

 give off short unicellular branchlets (fig. 58 F). The peripheral cells may reach the 

 surface of the host or be somewhat prominent, and the same is the case with the 

 sporangia; these are only seldom so prominent as that shown in fig. 58 C. The 



peripheral cells bear some- 

 times a hair which may be 

 more vigorous than in f. Rho- 

 domelce and two hairs in one 

 cell may even be observed 

 (fig. 58 A). The chromato- 

 phore has the same structure 

 as in f. Rhodomelce , and the 

 sporangia are also alike. For- 

 mation of a new sporangium 

 within an emptied sporangial 

 wall frequently occurs, appa- 

 rently repeatedly (fig. 58C,Z),G). 

 The sporangia were as a rule 

 better developed than in f. Rho- 

 domelce, probably on account 

 of the later season. 



The more or less immersed 

 monosporangia distinguish 

 this species from all other 

 described endophytic Chan- 

 transice known to me. 



B 



D 



Fig. 58. 



Chaiitransia iniim-rsa I'. Pohisiphonice. A , filament giving olf an emerging 

 cell bearing two hairs. B. end of filament witli hair. C, transverse section 

 of Polysiphonia nigrescens with llie endophyte. D and £, longitudinal fila- 

 ments giving olT radiating filaments with sporangia. jF, longitudinal fila- 

 ment with unicellular branchlets. 0. filament with s])orangia-bearing 

 branches, .m : 1. 



Localities. Forma Rhodomelce. 

 Kn: Frederikshavn, outer side of the 

 mole. 



Forma Polysiphonia'. Kit; Hirs- 

 liolmene, in Polysiphonia niijrescens, 

 September; dry rock at Jegens Odde 

 in the same, Sept.; Trindelen (Nl), 9,5 to 10,5 met., in Polijs. violaceu, Sept. 



22. €haiitrausia Polyidis sp. nov. 



Thallus endophyticus; fila in cortice exteriori et interiori hospitis {Polyidis 

 rotundi) intercellularia , vario modo, in directione radiali et transversali vel etiam 

 intermedia, praesertim tamen radiali, peripheriam versus crescentia, ramosa, ramis 

 sparsis. Cellulse forma varia, plerumque cylindricse vel utriculosae, saepe aliquantum 

 curvatse, long. 30 — 56 //, lat. 10,5 — 14 /i, peripheriam vei-sus breviores, adultse ut 

 videtur chromatophorum unicum valde ramosum, fere reticulatum continentes. 

 Cellulce ultima? rotundatae, oblongse vel clavatse, superficiem hospitis attingentes sed 



