BLASTOCLADIALES 695 



Zoosporangium produced basipetally from the end of hypha, short 

 cylindric with truncate ends, cut off in two parts by transverse cleavage 

 line, sometimes with exit-pore on the upper side, containing numerous 

 zoospores, without discharge tube or papilla. Zoospores with one pos- 

 terior cilium, escaping separately or in mass from cleavage line or exit- 

 pore of zoosporangium, with nuclear cap. Gemmae and chlamydocysts 

 present. Sexual organ unknown." (Kobayashi and Ookubo, he. cit.). 



Oedogoniomyces lymnaeae Kobayashi and Ookubo 

 Bull. Nat. Sci. Mus. (Tokyo) (N.S.) l,No. 1 (34): 63, figs. 1-6, pis. 21-22. 1954 



"Thallus fasciculate or single, composed of simple hypha. Hyphae 

 cylindric 0.5-1 cm. long, 20-37 u, thick at upper part, hyaline, pointed 

 at terminal, membrane 2-3 \i thick in adult stage, basal part attenuated 

 or discoid or stellate. Zoosporangium short cylindric 20-37 u. thick, 

 10-60 u, long, containing 100-200 zoospores, with one cleavage line or 

 exit-pore. Zoospores globose, ovoid or ellipsoid, 6-9 a in diameter, 

 commonly 6 u, with 18-25 \x long cilium. Gemmae chained at the upper 

 part of hypha, short cylindric, apparently cuboid in lateral view, sepa- 

 rated in adult stage, very thick walled, producing several zoospores when 

 matured. Chlamydocysts ellipsoid or broad fusiform, 19.5-49 15.3- 

 23.8 [jl, thick walled, finely pitted, with or without pedicel, single or 

 clustered on the end or lateral side of hypha which is simple or with 

 short lateral branches and remotely septate" (Kobayashi and Ookubo, 

 he. cit.). 



Forming clusters of thalli on the shells of living Lymnaea ollula, L. 

 reticulata, occasionally on vegetable debris, Japan. 



Emerson (comm.) has found a similar fungus which he believes be- 

 longs in the Eccrinales. The resting spores of the Japanese fungus 

 strongly resemble those of AUomyces. 



