694 AQUATIC PHYCOMYCETES 



reported finding several plants with resting spores but she does not 

 describe them. 



IMPERFECTLY KNOWN SPECIES OF BLASTOCLADIA 



? BLASTOCLADIA SP. Illdoh 



Science Rep. Tokyo Bunrika Daigaku, Sect. B, 4: 259. 1940 



"Fungus-body arbuscule, consisting of broad cylindrical trunklike 

 basal body and thin, well ramified branches, 700-800 [i high. Basal body 

 60-100 x 400-700 [J., attached to substrata by means of sparsely branch- 

 ed rhizoids, branches dichotomous to irregular, 20-25 jj. diam. 



"Zoosporangia (?) terminal, sympodially arranged on the branches, 

 cylindrical, 19-20 x 22-30 [jl, with a single dehiscence papilla, apically. 

 Zoospores not observed. 



"Chlamydocysts sympodially arranged on the branches, elliptical to 

 pyriform, 40-47 x 45-85 ij., with attenuated base, yellowish, containing 

 many oil drops; two membraned, the outer conspicuously pitted. Spore- 

 dehiscence not observed" (Indoh, loc. cit.). 



Saprophytic on submerged twigs of Moms sp., Japan. 



Indoh considers this incompletely observed fungus to be most closely 

 related to Blastocladia gracilis and B. incrassata but different from them 

 in that "(1) the basal body is thicker than that of Bl. gracilis and longer 

 than that of BL incrassata, (2) the zoosporangia (?) are shorter than 

 those of the two, (3) the chlamydocysts are longer than those of Bl. 

 gracilis, and not truncated, but somewhat attenuated basally." 



RECENTLY DESCRIBED TAXA 1 



OEDOGONIOMYCES Kobayashi and Ookubo 



Bull. Nat. Sci. Mus. (Tokyo) (N.S.) 1, No. 1 (34) : 62. 1954 



"Thallus apparently saprophytic on shells or other vegetable debris 

 in fresh water, eucarpic, composed of simple hypha, cylindric, hyaline, 

 with chitinous membrane, attached to substratum with appressorium, 

 without rhizoid, at first continuous, then transverse septa appear one 

 by one at the upper part of hypha, bringing forth zoosporangial cell. 



1 Not included in the key. 



