NO. 6 PHYCOMYCETES COLLECTED BY W. R. TAYLOR 105 



ference in width of the sporangium and its attendant hypha is so striking 

 that the former frequently appears as though it were a long, slender 

 fusiform or siliquiform highly refractive conidium lying free in the 

 tangled mycelial complex. The sporangia vary from 35 — 65;a long by 

 5 — 9/A wide, the base generally tapering to 2.5 — 4/x. The zoospores are 

 fully matured before discharge and emerge (pi. 17, fig. 9) through a 

 small pore formed upon the deliquescence of the sporangial apex, in the 

 same manner as in species of Monoblepharis (Sparrow, 1933). They 

 are ovoid or somewhat cylindrical, 7 — 9/x. long by 4.5 — 5 ft wide, and 

 possess a single long posterior cilium. The internal organization is exactly 

 like that found in Monoblepharis. 



Oogonia and antheridia are frequently formed on somewhat shorter 

 branches of the thallus than are the zoosporangia. The clavate or 

 obpyriform oogonium, 15 — 17/i long by 8 — \Ofi wide, with a narrow 

 base 2 — 3/x in diameter, may, like the sporangium, be at first terminal 

 but, after sympodial branching of the hypha, appears lateral. Both 

 oogonium and antheridium develop in the same manner as do those of 

 Monoblepharis sphaerica (Sparrow, 1933), i.e., the rudiment of the 

 terminal oogonium is formed first. After this is delimited, another, more 

 proximal segment is separated from the supporting hypha by a cross wall. 

 In most cases this basal segment before its delimitation has formed a 

 short branch beneath the oogonium which continues to increase in size 

 as maturation proceeds. The mature oogonium is thin walled and ap- 

 parently without a prominent receptive papilla, although further obser- 

 vations are needed on this point. The contents of the large, broadly 

 ellipsoidal egg are made highly characteristic and conspicuous by the 

 possession of numerous large, colorless, refractive globules (pi, 16, fig. 

 1), embedded in the clear cytoplasm. Although in most cases only a 

 single egg is formed in the oogonium, 2 — 6 have occasionally been found 

 (pi. 17, fig. 8). The mature antheridium, which may be formed singly 

 or in basipetal series beneath the oogonium, consists of a cylindrical 

 portion and a large, lateral, beaklike outgrowth, 8 — 10/x, long by A — 5(x 

 wide, formed from the previously mentioned branch. About 2 — 5 strongly 

 amoeboid, posteriorly uniciliated antherozoids, 5fi long by 3/a wide, are 

 produced which escape through a pore formed at the tip of the beak. 

 These may creep about after discharge or, like the zoospores which they 

 resemble in all but size, swim about in the medium. The early stages in 

 the process of fertilization are like those found in Monoblepharis. The 

 antherozoid after reaching the apex of the fully mature oogonium be- 



