CHYTRIDIALES 603 



the substratum, each 78-97 \i high, the main axis 58 u, long by 5-7 [x in 

 diameter, protoplasm golden with numerous vermilion granules, wall 

 fairly stout, colorless; zoosporangium ovoid, 19 jx in diameter, bearing 

 an apical somewhat flattened refractive operculum with a prominent 

 conical umbo, wall collapsing after discharge; zoospores spherical, 5 (x 

 in diameter, golden with a centric red globule, escaping from the vesicle 

 by rupturing of the wall, movement lively, shortly becoming amoeboid ; 

 resting spore somewhat spherical, 17-19 tj. in diameter, exospore blood- 

 red, covered with irregular protuberances, endospore nearly colorless, 

 smooth, contents golden with red granules, resting spore germinating 

 readily (even twenty-four hours after formation) by the cracking open 

 of the exospore and the elongation of the endospore into a long irregular 

 thick tube (with colorless contents?). 



On submerged insect cadavers (gnats, flies, wasps), European Russia. 



After the formation of sporangia the rest of the plant still contains 

 protoplasm, but there is no evidence that this is eventually used up, 

 even in sexual reproduction. 



