Ms [QUATIC PHYCOMYCETES 



cal, 60 70 (X in diameter with a smooth wall and numerous oil glob- 

 ules in the coarse contents. 



Saprophytic in dead pine pollen, in sea-beach soil (never submerged), 

 h\iY (Venice), Elba, Yugoslavia, Spain. 



IMPERFECTLY KNOWN SPECIES OF OLPIDIUM 



In Marine Algae 

 ? Olpidium aggregatum Dangeard 

 Le Botaniste, 2: 237, pi. 16, figs. 25-26. 1890-91 



Sporangium ovoid or ellipsoidal, its long axis parallel with that 

 of the host cell, with a long discharge tube arising at right angles 

 from the mid-region, its tip just penetrating the host wall or extending 

 slightly beyond it, wall stout, smooth, colorless; zoospores spherical, 

 with a colorless refractive globule, escape and flagellation not observed; 

 resting spore not observed. 



Occurring in linear aggregates in a marine species of Cladophora, 

 France. 



To judge from the shape of the sporangia of this species, as well 

 as from the fact that they occurred in linear aggregates in the alga, it is 

 very probable that Dangeard was dealing with Sirolpidium. Since the 

 flagellation of the zoospores was not observed, this cannot now be 

 said with certainty. 



Tokunaga (1933b: 79, pi. 5, fig. 8) has reported this species from 

 Japan, where it was found in a marine Cladophora. The sporangia, 

 which were described as narrowly ellipsoidal to cylindrical, sometimes 

 irregular, and 26.4-90 by 12-27.6 [x, were said to discharge narrowly 

 ellipsoidal uniflagellate zoospores. The zoosporangia figured closely 

 resemble in shape, location within the host, and vacuolization those 

 formed by Sirolpidium bryopsidis. 



? Olpidium entosphaericum (Cohn) Fischer 



Rabenhorst. Kryptogamen-Fl., 1 (4): 27. 1892 



Chythdium (?) entosphaericum Cohn, Hedwigia, 4: 170, 1865; Schultze. 

 Archiv. micro. Anat., 3: 43, pi. 2, figs. 5, 5a. 1867. 



Sporangium spherical, colorless, 16;jl in diameter, single in cells 



