338 AQUATIC PHYCOMYCETES 



globose, 28-40 u, high, 18-30 u. in diameter, somewhat thick-walled, 

 smooth, hyaline, with several (three to seven) sessile discharge pores 

 3-5 |x in diameter; apophysis endobiotic, connected with the sporan- 

 gium by a narrow short neck, large, subspherical or turbinate, 30-60 u, 

 in length, 1 5—20 [Jt in diameter, somewhat longitudinally furrowed; 

 rhizoid unbranched, arising from the base of the apophysis, attenuated 

 distally; zoospores numerous, ovoid, about 4 (x in diameter, with a 

 refractive globule and a long posterior fiagellum, swimming away in- 

 dividually through the discharge pores; resting spores not observed. 

 (Modified from Kobayasi and Ookubo.) 



Parasitic on Cladophora japonica (marine), Japan. 



The fungus attacked the alga, while it was growing in artificial sea 

 water. 



Phlyctochytrium kniepii Gaertner 



Archiv f. Mikrobiologie, 21: 117, figs. 1-2. 1954 



Sporangium spherical, 10-250 u, in diameter, wall smooth, colorless, 

 with three to thirty-five cylindrical, 3 by 3 u. papillae; rhizoidal system 

 strongly developed, somewhat coarse, usually with one, frequently 

 with several, subsporangial swellings arising from a single point at 

 the base of the sporangium (that is, a branched apophysis); zoospores 

 3 by 4 [i, with a 20-25 [x long fiagellum and usually one, rarely two, 

 strongly refractive oil droplets and several dark-appearing granules; 

 resting spore resembling the sporangium but with 6-16 jx long, fre- 

 quently sickle-shaped papillae and thicker wall with an inner hyaline 

 layer, when spherical, 10-60 fx in diameter, when irregular, 40 by 63 u. 

 to 40 by 20 jx, upon germinating the papillae deliquescing and typical 

 zoospores produced. 



From soil, isolated on fly leg, Gaertner (loc. cit.), South Africa; 

 pine pollen, Gaertner (1954b: 21), Egypt. 



This species is distinguished from others of the multiporous group 

 by the frequently strongly developed branched apophysis and the pecu- 

 liar resting spores with their very long papillae. 



Phlyctochytrium africanum Gaertner 

 Archiv f. Mikrobiologie, 21 : 120, figs. 3-4. 1954 

 Sporangium spherical, somewhat flattened at the base, 25-35 y. 



