CHYTRIDIALES 219 



of the zoospore of P. chlorogonii is given as 1-5 \x in the German text, 

 which is obviously a misprint for the 1.5 \l found in the Russian des- 

 cription. 



An incompletely observed chytrid with spherical or ellipsoidal spo- 

 rangia was also shown by Serbinow (1907: 158, pi. 4, fig. 37) to possess 

 a small knoblike haustorium like that of Phlyctidium chlorogonii. 



Phlyctidium eudorinae Gimesi 



Hydrobiologiai Tanulmanyok (Hydrobiologische Studien) II. Phlyctidium 



eudorinae Gim., n. sp...., pp. 1-5, Nemetiil 6-8, 1 pi., figs. A, 



1-8, B, 1-6. Budapest, 1924 



Phlyctidium eudorinae Skvortzow, Arch. Protistenk., 57: 205, fig. 3. 1927. 

 Rhizophydium beauchampi Hovasse, Ann. Protistol., 5: 73, figs. 1-4. 1936. 



Sporangium imbedded, except for its apex, in the gelatinous sheath 

 of the host colony, generally sessile on the cell of the alga, broadly 

 pyriform or ellipsoidal, with a blunt apex, 10-18 \i high by 4-10 \x 

 wide, wall smooth, colorless, delicate, evanescent after spore discharge; 

 part within the algal contents consisting of a spherical haustorium 

 1-5 [i. in diameter, attached to the base of the sporangium by a slender 

 filament; zoospores 3.5 u. long by 2.6 [x in diameter, escaping upon 

 the rupturing of the apex of the sporangium; resting spore pyriform, 

 thick- walled, 10 \x in diameter, with a large globule in the contents, 

 borne like the sporangium, germination not observed. 



Parasitic on Eudorina sp., Gimesi (be. cit.), Hungary; Eudorina 

 elegans, Skvortzow (loc. cit.), Manchuria; Eudorina illinoiensis, Ho- 

 vasse (he. cit.), France. 



A comparison of the figures and descriptions of the Hungarian and 

 French fungi shows them to be nearly, if not absolutely, identical. 

 One difference is in the number of zoospores formed, Gimesi stating 

 that from nine to twelve were produced, Hovasse, from twenty to 

 nearly one hundred. Since both accounts were lacking in certain 

 minor but essential points the diagnosis above represents a combi- 

 nation of the two descriptions. Gimesi observed the resting spores, 

 which were formed after terminal or lateral copulation of isogamous 

 gametes in gametangia (see "Sexual Reproduction," p. 70). Hovasse 

 gives more complete details on the morphology, development, cytol- 



