LEPTO MIT ALES 881 



basal; zoospores ordinarily swimming directly away, rarely encysting 

 at the orifice; oogonium either terminal on the main axis or on a short 

 linklike lateral branch, antheridium basal; oospore nearly filling the 

 oogonium, thick-walled, golden, the wall minutely and distinctly punc- 

 tate, germination not observed. 



On twigs, Minden {he. cit.), Hohnk (1935: 218), Germany; twigs of 

 Fraxinus, Sparrow (1933c: 532), United States. 



Certain investigators (Coker, 1923: 174; Coker and Leitner, 1938: 

 313) consider the punctations of the egg to be due to the arrangement 

 of oil globules, but in this they are mistaken. Photomicrographs of 

 plasmolyzed oospores show unquestionably that the wall is punctate. 



APODACHLYELLA Indoh 

 Science Rep. Tokyo Bunrika Daigaku, Sect. B, 4: 45-46. 1939 



(Fig. 69 F, p. 875) 



"Mycelium filamentous, branched, segmented by numerous constric- 

 tions, without basal body. Hyphal segments cylindrical with cellulin 

 grains. Hyphal membrane stainable faintly blue with zinc chloride- 

 iodine. 



"Zoosporangium not observed. 



"Oogonia multisporous. Oospores without periplasmic membrane. 

 Antheridia with several antheridial cells. Fertilization by a tube from 

 each cell. 



"Other characters as in Apodachlya. 



"Single species" (Indoh, he. cit.). 



Saprophytic in fresh water or soil. 



For description of the sex organs, see the introduction to the Lepto- 

 mitales (p. 858). 



Apodachlyella completa (Humphrey) Indoh 

 Science Rep. Tokyo Bunrika Daigaku, Sect. B, 4: 46, pi. 7, figs. 1-11. 1939 



Apodachlya (?) completa Humphrey, Trans. Amer. Phil. Soc, 17: 137, pi. 

 20, figs. 119-121. 1893. 



"Mycelium slender, filamentous, irregularly branched. Basal seg- 



