LAGENIDIALES 1009 



Zygospores hyaline, spherical, 13.3 tx, oval, elongate, 7.6 u. : 15.2 u., 

 with a sculptured outer and a smooth inner wall; containing a large 

 refractive globule; germination unknown" (Karling, 1942e). 



Parasitic and saprophytic in Closterium ralfsii var. hybridum, Russia. 



The description (Karling, 1 942e : 8 1) is based upon preserved material. 

 A figure in Jaczewski (1931:67) shows the antheridial cell to be narrowly 

 ellipsoidal and the oospores (?) spherical or ellipsoidal, with a papillate 

 outer wall. Until the zoospores have been studied, relationships of the 

 species will be in doubt. 



? Lagenidium syncytiorum Klebahn 

 Jahrb. wiss. Bot., 24:265, pi. 3, figs. 22-24. 1892 



Thallus a straight or irregularly curved filament 3-5 \x in diameter, 

 becoming expanded in beadlike fashion and producing more or less 

 irregular lateral outgrowths, which, by bending under, may form 

 several layers and fill the host cell; sporangia numerous, of different 

 shapes, spherical and 8-10 \i in diameter or oblong, curved or with 

 blunt outgrowths, less often in beadlike chains, separated by narrow 

 cross walls, discharge tube lateral, short, slightly prolonged extra- 

 matrically; zoospores and gametangia unknown. 



Parasitic in sexual filaments of Oedogonium boscii, Germany. 



Known only from preserved material. Attacked Oedogonium cells 

 were at first little affected by the parasite; nuclear division was not 

 hindered. Cross walls were not, however, laid down by the alga. Up to 

 four cells of normal size and nearly normal shape, lacking cross walls, 

 could be found in which the fungus had been living. 



De Wildeman (1895c: 218) has tentatively identified a sterile Lage- 

 nidium in single cells of Oedogonium with this species. He suggests that 

 the still questioned species Aphanistis pellucida Sorokin may be referable 

 to this fungus. 



i &» 



? Lagenidium zopfii de Wildeman 



Bull. Soc. Beige Micro., 16: 139. 1889-90 



Thallus tubular, with irregular cylindrical or inflated branches, 

 extending through several cells of the host; zoospores not observed; 



