LAGENIDIALES 



977 



Fig. 79. Lagenidiaceae 



A-C. Myzocytium proliferum Schenk in Conjugatae: A, three-celled thallus, 

 one cell of which has become converted into a zoosporangium whose recently 

 discharged zoospores are maturing at orifice of discharge tube; B, one-celled 

 thallus about to become segmented, cyst of zoospore and penetration tube 

 still persistent; C, thallus in Mougeotia which has become converted into sex 

 organs; the two outer cells are oogonia, each bearing an oospore; the two 

 inner cells are antheridia. D-E. Lagenidium nodosum (Dangeard) Ingold in 

 Lyngbya: D, endobiotic sexually formed resting spores developing on thallus; 

 E, protoplasm discharged and forming zoospores in a vesicle at orifice of 

 discharge tube. F-G. Myzocytium zoophthorum Sparrow in rotifers, thalli 

 bearing zoosporangia and sex organs. H. Myzocytium vermicola (Zopf) 

 Fischer in eelworm, zoosporangia and sex organs in cadaver. 



(A-B, Sparrow, 1932b; C, after Zopf, 1884; D-E, Ingold, 1949; F-G, 

 Sparrow, 1936a; H, Zopf, 1884) 



