MONOBLEPH ARID ALES 725 



the contents at maturity forming one or rarely up to three eggs bearing 

 numerous large refractive globules. Antheridium always formed ter- 

 minally on the hypha, later often epigynous, 8-19 jj. long by 4-7 \x in 

 diameter at the widest point. Antherozoids two to five, emerging 

 through a pore at the apex of the antheridium, strongly amoeboid, 

 ovoid when swimming, 4-5 \x long by 3-3.5 \x wide, with an anterior 

 group of small refractive globules, posteriorly uniflagellate, the flagellum 

 up to 19 \i in length. Zygote spherical or broadly ovoid, 10-13 ;jl long 

 by 8-10 [jl wide, posteriorly uniflagellate, free swimming, amoeboid 

 during rest periods, the contents bearing numerous large refractive 

 globules. Oospore formed free in the water, spherical, 9-13 \x in diam- 

 eter, with a light brown, smooth wall up to 1 jj, in thickness, contents 

 bearing globules, germination not observed" (Springer, he. cit.)- 



In soil, hempseed bait, coll. C. D. LaRue, Nicaragua. 



The strong tendency for basipetalous development of secondary 

 sporangia is distinctive for this species. Although the sex-organ arrange- 

 ment here resembles that of the previous species, it differs in the 

 frequent basipetalous development of the oogonia. Sex organs are 

 produced at all temperatures between 26° and 32°C. 



MONOBLEPHARELLA ENDOGENA Sparrow 



Mycologia, 45: 593, fig. 1. 1953 

 Mycelium well developed, of tenuous flexuous branched hyphae 

 2.5-6 \x in diameter, with many irregular swellings up to 9 \x in diameter, 

 contents reticulately vacuolate; sporangia siliquiform, 34-47 \x long 

 by 5-8 [x in diameter, occurring singly or in pairs at tips of the hyphae 

 or after sympodial branching appearing lateral; zoospores ovoid or 

 subcylindrical, 8 \x long by 5 u. wide, the posterior flagellum two to three 

 times the length of the body; oogonium at first terminal or after sym- 

 podial branching of hypha appearing lateral; clavate or obpyriform 

 with rounded apex and narrow cylindrical base, 10-15 ;jl long by 7.5- 

 8.75 \x wide, tapering to 2.5 [x at base, the contents at maturity forming 

 one, rarely up to four eggs bearing numerous large refractive globules ; 

 antheridium and antherozoids unknown; oospore spherical, 7.5-10 [x 

 in diameter, endogenous, with a slightly thickened light-brown smooth 

 wall, contents bearing globules. 



