53 



Fila endophytica irregulariter ramosa sub cellulis epider- 

 malibus hospitis horizontaliter repentia, e cellulis medio plus 

 minus irregulariter inflatis constructa. 



Fila erecta, ad 500 // alta, ramosa, apicem versus sensim 



attenuata, e cellulis ad basin 78 // latis, superne 2 3 latis, 



inferioribus c. 24^ longis, superioribus c. 50 , longis et subhya- 

 linis constructa. 



Chromatophorum parie- 

 tale pyrenoide laterali in- 

 structum. 



Sporangia oblonga, 14^ 

 longa et 8p lata in ramulis 

 unicellaribus solitaria vel 

 bina, raro sessilia adsunt. 



Fig. 55. Acrochsetium repens nov. spec. 

 Two erect ramified filaments with spor- 

 angia and the basal creeping part. 

 (About 300: 1). 



Fig. 56. Acrochsetium, repens nov. 



spec, a and b, erect filaments with 



sporangia, c, endophytic, basal 



filaments seen from above. 



(About 260 : 1). 



This species was found upon a Gracilaria-Mke plant. The 

 endophytic filaments creep below the surface cells of the host 

 (Fig. 55), forming a nearly reticular expansion (Fig. 56 c). The 

 basal filaments are irregularly ramified, consisting of barrel-shaped 

 or more irregularly formed cells more or less swollen in the middle 

 and much tapering towards both ends. 



