CHYTRIDIALES 137 



Olpidium entophytum (?) var. intermedium Constantineanu 

 Revue Gen. Bot., 13: 371, fig. 75. 1901 



Sporangium either spherical and 20-30 \i in diameter or elongate and 

 30-33 u. in diameter, wall thin, smooth, colorless, with a strongly pro- 

 jecting somewhat irregular or undulate discharge tube 108-1 14 \l long 

 by 6-8 [i in diameter; zoospores and resting spore not observed. 



In rotifer eggs, Rumania. 



If the zoospores of this fungus are found to resemble those of Ol- 

 pidium gregarium it is probably a tenable variety of that species. As 

 was suggested by Constantineanu, it also resembles O. macrosporum 

 Nowak. and may be referable to it. That only a single sporangium was 

 formed in Nowakowskfs species, whereas from five to twenty were 

 present in var. intermedium, is not considered significant. 



Olpidium sphaeropleae Tokunaga 

 Trans. Sapporo Nat. Hist. Soc, 13: 81, pi. 5, figs. 9-10. 1933 



Sporangia spherical, mostly solitary in the oospores of the host, 

 which they fill at maturity, 12-24u. in diameter, with a single short 

 cylindrical discharge tube; zoospores ellipsoidal to ovoidal, about 

 4.8 by 2.4 \x, uniflagellate; one resting spore, very rarely two, in the 

 oospores of the host, spherical, 11.4-12.6 [i (mostly 12 [i) in diameter, 

 with a smooth slightly golden wall 1 \x thick, contents with a large 

 globule, germination not observed. 



In oospores of Sphaeroplea annulina, Japan. 



The sporangia of this species resemble those of Rozella in their ten- 

 dency to fill the oospore of the host. 



Olpidium hyalothecae Scherffel 



Arch. Protistenk., 54: 200, pi. 9, figs. 62-63. 1926 

 (Fig. 13 D, p. 136) 



Sporangia pyriform, with a smooth colorless thin wall, one or two, 

 rarely three, occupying the greater part of the host cell, 6.5—19 jjl in 

 diameter and 9-28 [i. long, forming a short discharge tube which grows 

 to the outer surface of the host cell; zoospores spherical, 3-4 \x in diam- 



