CHYTRIDIALES 141 



4-5 [J. in diameter, with a small colorless basal globule and a long 

 flagellum, movement lively; resting spore spherical, with a smooth 

 thick wall and a large globule, infection tube often persistent, appear- 

 ing as an appendage, germination not observed. 



In pine pollen, Zopf (he. cit.), Germany; (?) pollen, Voronichin 

 (1920:9), Russia; pollen of Pinus ponderosa, Graff (1928:158) 

 pine pollen, Sparrow (1952d: 759), United States; pine pollen, 

 Gaertner (1954b: 20), Egypt, Northwest Africa, West Africa, 

 Equatorial East Africa, South Africa; Gaertner (op. cit., p. 40), 

 Sweden, Spitsbergen. 



? Olpidium maritimum Hohnk and Aleem 

 Veroff. Inst. Meeresforsch. Bremerhaven, 2: 227, figs. 1-7. 1953 



Sporangium spherical, 12.6-21.6 [j. in diameter, with smooth, thin 

 wall and simple discharge tube up to 12 [x long by 4-5 [jl wide which 

 protrudes slightly from the substratum; zoospores numerous, oval 

 or subspherical, 2.7-4.05 by 1.9-3 [x, with a basal globule and poste- 

 rior flagellum emerging at first in a mass; resting spore spherical, with 

 a large oil globule, wall smooth, 1.2-2.7 [j. thick, upon germination 

 forming a discharge tube and zoospores. 



In pollen grains, in brackish soil, Germany. 



Whether this species is distinguishable from Olpidium pendulum is 

 questionable. Its zoospores are not significantly smaller, although they 

 are ovoid instead of spherical. Other differences such as slightly pro- 

 jecting discharge tube and lack of a persistent infection tube do not 

 seem of specific rank. 



Zoospore production was optimal in water of 13 percent salt con- 

 tent. It was also good in distilled water. In view of Aleem's (1952a) 

 report that Lagenidium entophytum, Myzoeytium proliferum, and Rhi- 

 zophydium couchii all can live in saline waters, perhaps we are dealing 

 here with a similarly adaptive Olpidium pendulum. 



