5 70 A Q UA TIC PH YCO M YCETES 



"Zoosporangia hyaline, smooth, almost spherical, 4-140 \x, broadly 

 and narrowly pyriform, 5 x 7 — 60 x 150 \x, ovate, egg- or spindle- 

 shaped, elongated, tubular and cylindrical, occasionally obclavate or 

 irregular and plurilocular with one to several thick exit papillae or 

 tapering tubes of varying length, 15-75 \x, and diameter, 5-20 \x; oper- 

 culum spherical, 4-8 \x, or oval, 4 x 5 — 6 x 7 u,. Zoospores hyaline, 

 spherical or slightly oval, 3-5 u., with a clear refractive globule in the 

 center. Rhizoidal system usually extensively developed, branched, coarse 

 and irregular, often invading several adjacent host cells and attaining 

 a diameter of from 2-10 u, at its point of insertion on the sporangium. 

 Resting spores hyaline or occasionally with a faint yellow tinge, predom- 

 inately spherical, 4.5-18 \x, oval or slightly ellipsoidal, 5x7 u, — 12 x 

 16 \i, smooth, rough, or warty; germination unknown" (Karling, loc. 

 cit.). 



In various algae, tissues of higher plants, and cysts of Monadineae, 

 dead Chara, onion skin, bleached grass leaves, soil and water, Karling 

 (loc. cit., 1941a: 387; 1941b: 108; 1942c: 620; 1948c: 509), in decayed 

 maize stem, Sparrow (1952d: 768), United States; saprophytic in tis- 

 sues of higher plants, de Wildeman (loc. cit.), France; rotifer eggs and 

 nematodes, Karling (1946b: 2, pi. 2, fig. 46), Brazil. 



Successful cultivation on solidified media as well as on a variety of 

 cooked algae and plant tissues has been reported by Karling. 



The inclusion of Dangeard's Entophlyctis maxima in the synonymy 

 is open to question, since no zoospore discharge was observed; his 

 fungus may, in fact, be inoperculate and hence a species of Entophlyctis. 



Endochytrium pseudodistomum (Scherffel) Karling 

 Mycologia, 33: 357. 1941 



Entophlyctis pseudodistoma Scherffel, in Domjan, Folia cryptogam., 2: 24, 

 pi. 1, figs. 64, 66, 68, 70, 76-81, 85-87, 99, 100, 111. 1936. 



Sporangium endobiotic, somewhat ellipsoidal, 17.5-25.4 u, high by 

 1 5-25.4 \x broad, with a smooth colorless wall, the extramatrical case of 

 the infecting zoospore persistent, discharge tube 5-15 jj. long by 5-7.5 u. 

 in diameter, generally formed on upper part of the sporangium near the 

 place of attachment to the spore case, rarely lateral; rhizoids stout, 



