722 AQUATIC PHYCOMYCETES 



at maturity forming one or occasionally up to four eggs, containing 

 numerous large refractive globules; antheridia hypogynous, often 

 several developed in basipetal succession, consisting of a cylindrical 

 segment of the suboogonial hypha and a beaklike lateral outgrowth 

 4-1 5 ;x long by 4 7 \x wide (terminal ones 8-25 fx by 4-8 jx) ; antherozoids 

 two to five, strongly amoeboid, posteriorly uniflagellate, ovoid when 

 swimming, about 5.6 \i long by 3.4 \i wide, escaping through a pore 

 formed at the tip of the beak ; zygote broadly ovoid to nearly spherical, 

 10-13 [x long by 8-10 jx wide, posteriorly uniflagellate, free-swimming, 

 the contents bearing numerous large refractive globules ; oospore formed 

 free in the water, spherical, 8-13 [x in diameter, with a slightly thickened 

 light-brown smooth wall, contents bearing globules, forming a mycelium 

 upon germination. 



In soil, hempseed bait, coll. W. R. Taylor, British West Indies, 

 Panama; coll. C. D. LaRue, Nicaragua. 



MONOBLEPHARELLA ELONGATA Springer 



Mycologia, 37: 206, figs. 1-23, 47. 1945 



"Mycelium well developed; hyphae sparingly branched, the branches 

 usually arising at right angles to the main axes, 1.5-4 tx in diameter, the 

 stouter basal portions up to 7 ;x; vacuolization reticulate or scalariform; 

 hyphae usually with many irregular swellings. Sporangia narrowly 

 cylindrical or siliquiform, 40-120 jx in length by 5-13 ;x in diameter at 

 the widest point, tapering to 2-4 jx at the base, terminal, or after sym- 

 podial branching of the hyphae, appearing lateral, usually with one or 

 occasionally several lateral papillate outgrowths near the base. Zoo- 

 spores emerging through a pore at the apex of the sporangium and 

 through the apices of outgrowths; zoospore with an anterior group of 

 small refractive globules, ovoid or subcylindrical, 6.5-10.5 jx long by 

 4-6 ix wide, the single posterior flagellum up to 26 u. long. Oogonium 

 at first terminal or, after sympodial branching of the supporting hypha, 

 appearing lateral, narrowly obpyriform, 17-35 [x long by 7-12 (x in 

 diameter at the widest point, with rounded apex and a cylindrical base 

 2-4 a in diameter, the contents at maturity forming one to three or 

 rarely up to eight eggs containing numerous large refractive globules. 



