452 AQUATIC PHYCOMYCETES 



POLYPHAGUS EUGLENAE Nowakowski 



Cohn, Beitr. Biol. Pflanzen, 2: 203, pi. 8, figs. 1-7, 12; pi. 9, figs. 1-6, 14-15. 

 1876 (sensu recent. Bartsch, Mycologia, 37: 566, figs. 9-18. 1945) 



(Fig. 5, p. 80) 



Polyphagia euglenae Nowakowski pro parte (loe. cit.). 



"Prosporangia extramatrical, lying free in the medium, rarely ses- 

 sile, typically fusiform, clavate, commonly spherical, ellipsoid, elon- 

 gated or irregular, 7.2-38.4, av. 18.1 ^ in diameter X 12.2-200.0 or 

 more, av. 36.2 \x long; with 2-8 rhizoidal axes about 6 jx in diameter 

 at their point of origin, the latter branched and rebranched with their 

 tips imbedded in a number of hosts. Zoosporangia typically lateral on 

 a fusiform prosporangium, usually elongated, tubular and tapering 

 toward the apex, occasionally short-cylindrical or curved, rarely ovoid 

 or ellipsoid, 7.6-36.0, averaging 18.7 \x in diameter x 21.8-179.2 or 

 more, av. 107.7 jj. long, with thin smooth wall, opening by an apical 

 deliquescence pore, containing one to many hundreds of zoospores. 

 Zoospores cylindrical to ellipsoid, 3-5 \x in diameter x 6-13 \x long, 

 containing a single posteriorly located pale yellow oil droplet and 

 provided with a long posterior flagellum, escaping individually and 

 generally swimming away immediately, positively phototactic, occasion- 

 ally some zoospores germinating inside the sporangium. Antheridia 

 fusiform, clavate, spheroid or irregular, 4.1-14.2, av. 9.4 \i in diameter 

 X 6.6-35.4, av. 16.7 \x long; oogonia fusiform, saccular or irregular, 

 12.3-21.4, av. 16.3 jx in diameter X 14.8-61.7, av. 26.3 \x long. Zygo- 

 spore spheroid, ovoid or wide-fusiform, 10.6-26.3, av. 17.9 y. in diameter 

 x 18.0-27.0, av. 22.6 \x long, with a thick, 2-layered wall, the exospore 

 bright yellow to amber or brown and beset with delicate conical spines 

 or rarely with bullations, endospore smooth and hyaline; subterminal 

 on an elongated conjugation tube 6.5-67.2, av. 18 [i long x 1.8 y. in 

 diameter, separated from oogonium by a portion of that tube 4.9-13.2, 

 av. 8.9 [x long x 3.3 \x in diameter; functioning in germination as a 

 prosporangium" (Bartsch, he. cit.). 



On Euglena sanguinia, Gross (1851), Euglena sp., Bail (1855: 678), 

 E. viridis, Nowakowski (he. cit.; 1878: 181), Euglena sp., Fisch (1884a), 

 Minden (1915:382, fig. 28f [p. 364]), Germany; Euglena, Entz, Sr. 



