158 British Fungi. 



Reessia amsehoidea, Fischer^ Beitr. Kennt. Cbvtrld ; 

 Sacc. Syll. vii. 1, 11. 1057. 



In the cells of living plants of Lemna minor and L. 

 polyj'rhiza. Rare. 



A miuute fungus met witli in the cells of living 

 fronds of Lemna, and referred with a certain amount of 

 d'jubt to the above species. 



Chytridium, A. Bmun. 



Zoosporangia formed in the cells of the matrix, 

 furnished with simple or branched rbizoid-like 

 branches of mycelium which spring from the base or 

 from various points of the surface, and separated from 

 the cavity of the sporangium by septa^ zoospores uni- 

 ciliate, escaping through a pore at the apex of a 

 lengthened beak ; resting-spores furnished with a 

 double membrane, formed within the cells of the 

 host. 



Chytridium, A. Braun, Betractung. Ersch. Yerjung. 

 Nat. 1850; Sacc. Syll. vii. p. 304; Dangeard, Ann. 

 Sci. Nat. ser. vii. vol. iv. p. 293. 



Distinguished from Syncliytriiim by the presence of 

 mycelium attached to the zoosporangia. 



Chytridium helioformis. Dang, 



Zoosporangia globose, 10-14 /x diameter, furnished 

 with a long beak; rhizoids five or six in number, 

 simple or slightly branched, springing from basal 

 portion ; zoospores globose, about 3 /j, diameter ; 

 resting-spores spherical, 14-18 //, diameter. 



Chytridium helioformis, Dangeard, Ann. Sci. Nat. 

 ser. vii. vol. vi. p. 293 ; Sacc. Syll. vii. n. 1079. 



