454 AQUATIC PHYCOMYCETES 



"Prosporangia extramatrical, lying free in the medium, rarely sessile, 

 typically globose, 12.3-28.4, av. 22.4 [J. in diameter, or ovoid, 1 1.2-26.2, 

 av. 19.2 jx in diameter x 18.4-28.6, av. 24.0 u, long, occasionally 

 irregular in shape, with 1-6 rhizoidal axes about 3 [i in diameter at 

 their point of origin, the latter extensive, branched repeatedly and with 

 their tips imbedded in a number of hosts. Zoosporangium located at 

 any point on surface of prosporangium but typically diametrically 

 opposite the insertion point of the most prominent rhizoidal axis, 

 typically ovoid, 19.2-35.2, av. 27.5 \x in diameter x 25.6-41.6, av. 

 36.5 \x long, with thin smooth wall, opening by an apical or subapical 

 deliquescence pore, containing several to many zoospores. Zoospores 

 ovoid to elongated, 3.0-3.4, av. 3.3 \x in diameter x 5.0-6.5, av. 6.4 \x 

 long, containing a single posteriorly located, pale bluish-green droplet 

 and provided with a long posterior flagellum, escaping individually and 

 generally swimming away immediately, positively phototactic, rarely 

 germinating inside the sporangium. Antheridia spherical, ovoid or 

 irregular, 4.2-15.4, av. 9.8 \x in diameter x 6.4-23.8, av. 16.5 u, long; 

 oogonia spherical, ovoid or irregular, 14.0-28.2, av. 18.0 jx in diameter 

 X 15.4-25.2, av. 20.8 [jl in diameter. Zygospores ovoid, truncated, 

 spheroid, elongated, reniform, lacrymoid, clavate, constricted, or irreg- 

 ular, 14.0-28.2, av. 19.7 \x in diameter X 19.6-35.0, av. 26.2 \x long, 

 with thick, 2-layered wall, the exospore smooth, hyaline, rarely pale 

 yellow, the endospore smooth and hyaline, terminal on a more or less 

 elongated conjugation tube, 2.8-77.0, av. 28.2 jjl long X 1.4-5.2, av. 

 3.0 u, in diameter and sessile on the larger gametic thallus, functioning 

 in germination as a prosporangium" (Bartsch, he. cit.). 



On Euglena, Dangeard (1900 1901c), France; Euglena, Nowakowski 

 (1876a; 1878), Minden (1915: 382), Germany; Euglena, Constantineanu 

 (1901: 383), Rumania; Euglena sp., Wager (1913: 180), Sparrow (1936a: 

 453, pi. 14, figs. 21-22; 1935a: fig. 2 h-i), Great Britain; Chlamy- 

 domonas, Skvortzow (1927: 206), Manchuria; Euglena viridis, Euglena 

 sp., Bartsch (be. cit.), United States. 



Polyphagus nowakowskii Raciborski 

 Parasitische Algen und Pilze .lava's, p. 6. Batavia, 1900 

 Prosporangium spherical, thin-walled, 9-16 (i. in diameter, with sev- 



