382 AQUATIC PHYCOMYCETES 



production (outside in a vesicle), this fungus probably belongs elsewhere, 

 possibly in a new genus. It is certainly not a form of Entophlyctis 

 confervae-glomeratae. 



IMPERFECTLY KNOWN SPECIES OF ENTOPHLYCTIS 



? Entophlyctis characearum de Wildeman 



Ann. Soc. Beige Micro. (Mem.), 20: 131, pi. 12, figs. 1-10. 1896 



Sporangium unknown; resting spore spherical, ellipsoidal, or irregu- 

 larly polygonal, 17-25 [j. in diameter, with a thick smooth brownish wall; 

 rhizoids much branched, generally arising from two stout main axes 

 (occasionally one); germination not observed. 



In oogonia of Characeae, Switzerland. 



The resting spores are certainly those of some chytrid, but until the 

 sporangial stage is observed, it is difficult to say to which of several 

 genera the fungus belongs. 



? Entophlyctis maxima Dangeard 

 Le Botaniste, 24: 242, pi. 24, figs. 4-5. 1932 



Sporangium very broadly pyriform, 40 [jl in diameter, with a broad 

 apical papilla, 5-15 \x in diameter, which just pierces the algal wall: 

 rhizoids branched, arising from as many as three main axes on the 

 lower half of the sporangium; zoospores and resting spore not observed. 



In Cladophora glomerata, France. 



Karling (1937a) considers this incompletely known form to be synon- 

 ymous with Endochytrium operculatwn (see p. 569). 



? Entophlyctis tetraspora (Sorokin) de Wildeman 



Bull. Soc. Roy. Bot. Belg. (Mem.), 35: 51. 1896 



Rhizidium letrasporum Sorokin, Arch. Bot. Nord France, 2: 35, fig. 42. 

 1883 (separate). 1 



Sporangium pyriform, wall smooth, thin, colorless, with a short 

 discharge tube which just pierces the wall of the alga; rhizoids short, 

 apparently unbranched, forming a cluster at the base of the sporangium; 



1 See also Revue Mycologique, 11: 137, pi. 80, fig. 98. 1889. 



