132 
the cuticle of the host (fig. 58 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 
pe = peripheral cells bear some- 
8 mn à PA times a hair which may be 
i d more vigorous than in f. Rho- 
domelæ and two hairs in one 
cell may even be observed 
(fig. 58 A). The chromato- 
phore has the same structure 
as in f. Rhodomelæ, and the 
sporangia are also alike. For- 
mation of a new sporangium 
within an emptied sporangial 
wall frequently occurs, appa- 
rently repeatedly (fig.58 C, D, G). 
The sporangia were as a rule 
better developed than in f. Rho- 
domele, probably on account 
of the later season. 
The more or less immersed 
monosporangia distinguish 
this species from all other 
described endophytic Chan- 
transie known to me. 
Fig. 58. 
Chantransia immersa f. Polysiphoniæ. A, filament giving off an emerging 
cell bearing two hairs. B, end of filament with hair. C, transverse section 
of Polysiphonia nigrescens with the endophyte. D and E, longitudinal fila- mole. 
ments giving off radiating filaments with sporangia. F, longitudinal fila- Forma Polysiphonie. Kn: Hirs- 
ment with unicellular branchlets. G, filament with sporangia-bearing 
branches. 300:1. 
Localities. Forma Rhodomele. 
Kn: Frederikshavn, outer side of the 
holmene, in Polysiphonia nigrescens, 
September; dry rock at Jegens Odde 
in the same, Sept.; Trindelen (NI), 9,5 to 10,5 met., in Polys. violacea, Sept. 
22. Chantransia 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, præsertim tamen radiali, peripheriam versus crescentia, ramosa, ramis 
sparsis. Cellule forma varia, plerumque cylindricæ vel utriculosæ, sæpe aliquantum 
curvatæ, long. 30—56 », lat. 10,5—14 », peripheriam versus breviores, adultæ ut 
videtur chromatophorum unicum valde ramosum, fere reticulatum continentes. 
Cellule ultimæ rotundatæ, oblong vel clavate, superficiem hospitis attingentes sed 
