724 AQUATIC PHYCOMYCETES 



4-8 [i.] 1 ;antherozoids 2-8, amoeboid, posteriorly uniciliate, ovoid when 

 swimming, 4-6 \x long by 2.5-3.7 u, in diameter, normally containing 

 2-4 strongly refractive globules; zygote broadly ovoid to nearly spher- 

 ical, 10.5-13.6 [x long by 8-10 a in diameter, free swimming or becoming 

 stationary at oogonial orifice; oospores formed free in the water or 

 within oogonium or at its mouth, normally spherical, 10-13 (j. in diam- 

 eter with a slightly thickened, amber to light brown, smooth wall, 

 contents containing many large refractive globules, upon germination 

 forming a mycelium" (Shanor, he. tit.). 



In soil, hempseed bait, Shanor (loc. cit.; 1944: 332), Mexico. 



Springer (1945b) experienced considerable difficulty in her attempts 

 to induce sex-organ formation in this species. They developed only at 

 36°C. and then sporadically. Their sequence of development is just the 

 reverse of that in Monoblepharella taylori and M. elongata. In old 

 heavily contaminated cultures the two types of sex organs tend to form 

 in clusters and the eggs are usually abnormal. 



Monoblepharella laruei Springer 

 Mycologia, 37: 212, figs. 24-46, 51. 1945 



"Mycelium well developed; hyphae sparingly branched, the branches 

 usually arising at right angles to the main axes, delicate, 1.5-4 [x in 

 diameter, the stouter basal portions up to 7 [j.; vacuolization reticulate 

 or scalariform; hyphae with occasional swellings. Sporangia cylindrical 

 or siliquiform, 28-82 u. long by 7-15 \x in diameter at the widest point, 

 occurring at the tips of hyphae, or several often developed in basipetal 

 succession, later sporangia sometimes geniculate. Zoospores emerging 

 through a pore at the apex of the sporangium, ovoid or somewhat 

 cylindrical, 7-9 (ji long by 5-5.5 \x in diameter, with an anterior group 

 of small refractive globules, posteriorly uniflagellate, the flagellum up 

 to 27 [j. in length. Oogonium terminal on a branch subtending the anther- 

 idium, or formed by a swelling of the hypha below the antheridium, 

 after sympodial branching of the hypha appearing lateral, obpyriform, 

 1 1 20 [i. long by 7-12 \x in diameter at the widest point, with rounded 

 apex, and, if terminal, with narrowly cylindrical base tapering to 2-4 \i. 



1 Springer (1945b). 



