58 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



Cellulæ subcylindricæ, dolioformes, medio plus minus inflatæ 

 vel interdum magis irreguläres, 8 — 14// latæ, ca. 35// longæ, chro- 

 matopliorum stellare, pyrenoide centrali instructum continentes. 



Pili hyalini terminales, non numerosi, 

 adsunt. 



Sporangia, sessilia aut pedicellata, sin- 

 gula vel interdum bina, globulose-obovata, 

 ca. 20// longa et ca. 14 /i lata. 



This species was found abundantly in 

 Liagora pinnata. It creeps among the assi- 

 milating fdaments in the mucilage and 

 chalk coating found here (Fig. 60). 



The filaments are not particularly 

 branched and rather long intervals occur 

 which have no branches at all; in some 

 parts of the filaments on the other hand 

 branchlets are given off from the outer 

 side of nearly each cell in the filaments 

 (Fig. 61). Sometimes these branchlets are 

 repeatedly ramified ; it also happens occa- 

 sionally that two branchlets arise from the same cell. These 

 branchlets bear the monosporangia, but sessile sporangia placed 

 immediately upon the cells of the main filaments are not un- 

 common. 



Fig. ()0. Acrochsetium 



Liagoræ nov.sTpec. Part 



of a plant between tlie 



assimilating filaments 



of Liagora. 



(About 120 : 1). 



Fig. 61. Acrochsetium Liagoræ nov. spec. Parts of three plants with 

 sporangia (some ones emptied). (About lb:l and 200:1). 



The cells in the main filaments are irregular in shape, mostly 

 somewhat swollen in the middle tapering towards both ends; in 

 the middle their diameter reaches a length of about 16//, at the 

 ends about 8//; their length varies about 35/r/. 



The chromatophore (Fig. 62) is stellate with long strands run- 



