CHYTRIDIALES 315 



? Rhizophydium spirotaeniae (Scherffel) Sparrow 



Aquatic Phycomycetes, p. 216. 1943 



Chytridium (?) spirotaeniae Scherffel, Arch. Protistenk., 53: 14, pi. 1, figs. 

 26-29. 1925. 



Sporangium epibiotic, broadly ovoid, its longer axis parallel with 

 that of the host cell, with a conical protuberance (papilla) eccentri- 

 cally placed on the somewhat flattened upper surface, 12-14 y. in diam- 

 eter by 8-9 [i high, wall smooth, colorless, thin, opening with an apical 

 or lateral pore; rhizoids not observed; resting spore epibiotic, sessile 

 (?), colorless, spherical, ll-20u, (generally \6\i) in diameter, wall of 

 two layers, the outer densely covered with broad, blunt or pointed, 

 straight or slightly curved, solid, refractive, raylike protuberances 3 \i 

 wide at the base by 2-3 jj. high, inner wall smooth, 2 [x thick, contents 

 colorless, with numerous coarse globules (fat?), germination not ob- 

 served; male cell epibiotic, sessile (always?), rounded, smooth, thin- 

 walled, apparently without rhizoids, connected to the resting spore 

 by a cylindrical tube 2 \i in diameter which is expanded distally to form 

 a spherical or pyriform swelling, the tubular part sometimes lacking. 



Parasitic on Spirotaenia condensata, Hungary. 



Because of lack of data on the rhizoids and type of discharge, the 

 fungus cannot yet be accurately placed generically. Scherffel suggested 

 that it is a species of either Zygorhizidium or Rhizophydium, depending 

 on whether it is operculate or inoperculate. It is here considered to 

 belong to Rhizophydium because of the epibiotic resting spore and the 

 shape of the sporangium. It could, of course, be a species of Chytrio- 

 myces. 



SECTION V 



On Fresh-Water Algae 



? Rhizophydium coleochaetes (Nowak.) Fischer 

 Rabenhorst. Kryptogamen-Fl., 1 (4): 99. 1892 



Chytridium coleochaetes Nowakowski, in Cohn, Beitr. Biol. Pflanzen, 2: 



80, pi. 4, figs. 5-10. 1876. 

 Olpidium coleochaetes (Nowak.) Schroeter, Kryptogamenfl. Schlesien, 3 



(1): 182. 1885. 



Sporangium resting on the surface of the egg of the host but elon- 



