CHYTRIDIALES 531 



On Chlamydococcus pluvialis, Germany. 



Mentioned by Fischer and Minden under Rhizophydium acuforme 

 (Zopf) Fischer. 



? Chytridium cornutum Braun 

 Abhandl. Berlin Akad., 1855: 50, pi. 4, figs. 8-19. 1856 



Rhizophydium cornutum (Braun) Rabenhorst, Flora Europaea algarum, 



3: 281. 1868. 

 Phlyctidium cornutum (Braun) Sorokin, Arch. Bot. Nord France, 2: 19, 



fig. 14. 1883 (separate). 



Sporangium sessile, at first spherical, later ellipsoidal with several 

 hornlike outgrowths of different lengths, 10-12.5 u. in diameter (without 

 protrusions); zoospores posteriorly uniflagellate; rhizoids and resting 

 spore not observed. 



On Anabaena circinalis, Braun {he. cit.), Germany; Hormidium var- 

 ium, Sorokin (1874b: 8, pi. 1, figs. 18-28; 1883: 19, fig. 14), Euro- 

 pean Russia (southern part). 



Sorokin (be. cit.) states that the posteriorly uniflagellate ellipsoidal 

 zoospores escape through a pore on the upper face of the sporangium. 

 No endobiotic part has been observed, nor has the method of opening 

 of the sporangium been described. The fungus may possibly belong in 

 Rhizophydium. 



? Chytridium depressum Braun 



Monatsber. Berlin Akad., 1855: 383; Abhandl. Berlin Akad., 1855: 46, pi. 4, 



fig. 7. 1856 



Sporangium very broadly pyriform, resting with its wide base on the 

 host cell, somewhat flattened, with a prolonged erect or slightly bent 

 apiculus, wall smooth, colorless, 37 \x broad by 25 \jl high; rhizoids, 

 method of discharge of zoospores, and resting spore not observed. 



On Coleochate prostrata, coll. Pringsheim, Germany. 



? Chytridium elodeae Dangeard 

 Le Botaniste, 1:61, pi. 3, fig. 25. 1889 

 Sporangium sessile (?), nearly spherical, variable in size, up to 30 [x 



