Classification . 159 



In the interior of species of Chara, Nitella, ani 

 Vaucheria. 



The long beak to the zoosporangium suggests the 

 genus Olpiclium, which, however, differs in the total 

 abyence of rhizoids. 



Olpidium, A. Br. 



Zoosporaugia globose or elliptical, parasitic in the 

 interior of cells of the hose without a trace of mycelium, 

 furnished with one or more beaks through which the 

 zoospores escape ; resting-spores with a thick, smooth 

 membrane. 



Olpidium, A. Braun, Ueber Chytrid. in Monatsber. 

 Kon. Preuss. Akad. der Wiss. 1855 ; Dangeard, Ann. 

 Soi. Nat. ser. vh. vol. iv. p. 284 ; Sacc. Syll. vii. p. 

 810. 



The total absence of rooting mycelium and presence 

 of a beak to the zoosporangia are the principal dis- 

 tinctive features of the present genus. 



Olpidium lernn^, Schroet. 



Zoosporangia globose, usually solitary in the cells of 

 the host, furnished with a lengthened cylindrical beak, 

 12-18 fM diameter; resting-spores globose, wall thick, 

 smooth, almost colourless, 12-20 /jl diameter. 



Olpidium lemnm, Schroet. Fl. Schles. p. 181 ; Sacc. 

 Syll. vii. n. 1091. 



In epidermal cells of Lemna minor. Probably not 

 uncommon. 



MYCOMYCETES. 



The Mijcom)jcetes, or higher non-sexual fungi of 

 Brefeld, are connected with the Fliijcomycetes, or lower. 



