CHYTRIDIALES 383 



zoospores four, spherical, with a short flagellum and a colorless eccen- 

 tric globule; resting spore not observed. 



In Rhynchonema (Spirogyra?) sp., Russia. 



The validity of the species has been questioned by Fischer and Minden. 

 Sorokin's figure shows two empty sporangia (one with three zoospores 

 near the orifice) and another in which four zoospores occupy only a 

 small part of the available space. It is possible that the sporangium on 

 which the four-spored character was based was already partly emptied. 



? Entophlyctis woronichinii Jaczewski 



Opredelitel gribov I. Fikomitsety, p. 44. 1931 



Sporangium of irregular shape and 19.8-13.7 \x in diameter or rounded 

 and 10-1 1 \x in diameter, wall of two layers, colorless, 2-4 \i thick. 

 In zoospores of Vaucheria sessilis, V. geminata, Russia. 



DIPLOPHLYCTIS Schroeter 



Engler and Prantl, Natiirlichen Pflanzenfam., 1 (1): 78. 1892 (1893) 



(Fig. 23, p. 385) 



Thallus endobiotic, monocentric, eucarpic, consisting of the rudiment 

 of the sporangium, an apophysis, and an extensive branched rhizoidal 

 system, the cyst of the infecting zoospore evanescent; sporangium 

 inoperculate, with a discharge tube and an apophysis, zoospores 

 posteriorly uniflagellate, with a single globule, fully formed within the 

 sporangium, emerging through a pore produced at the tip of the 

 discharge tube; resting spore thick-walled, borne like the sporangium, 

 sexually or asexually formed, upon germination functioning either as a 

 sporangium or a prosporangium. 



Species of Diplophlyctis are primarily inhabitants of moribund and 

 dead members of the Characeae and, less often, the Chlorophyceae. 

 Indeed, it is difficult to find old plants of Nitella and Chara in which 

 one species, D. intestina, is not present in abundance. 



As indicated in the diagnosis, two methods of resting-spore germi- 

 nation have been described in the literature. Zopf (1 884: 195) states that 

 in Diplophlyctis intestina the resting structure becomes transformed into 



