CHYTRIDIALES 509 



(mostly 8 \x) in diameter, with a thick double wall the outer surface of 

 which bears a series of regularly arranged short rodlike blunt protuber- 

 ances, contents granular, with a large (5 \x) oil globule, germination not 

 observed; male cell laterally attached, spherical, smooth, thin-walled, 

 2-3 [X in diameter. 



On setae of Bulbochaete sp„ Scherffel (loc.cit.), Hungary; Oecio- 

 gonium sp., Sparrow (1933c: 526, fig. I, 11-12), United States; Bul- 

 bochaete sp., Typha pollen, Sparrow (1936a: 438, pi. 15, fig. 18), Bul- 

 bochaete sp. coll. Odam, Great Britain. 



The proper disposition of this species is puzzling. If, as Scherffel 

 asserts, the zoospores are discharged after the gelatinization of a basal 

 part of the sporangium or by a bursting apart of the sporangium, and 

 if the resting spores are epibiotic, the species can hardly belong in 

 Chytridium. Mere bursting of the wall would not seem comparable 

 with the formation of a definite operculum. Further observations on 

 spore discharge and the nature of the rhizoidal system (it may, indeed, 

 be Phlyctidium-Wkt) are necessary to determine the precise affinities of 

 the fungus. Rhizophydium v. mindeni Valkanov (1931a: 363) may be 

 identical with Scherffel's organism, but since only empty sporangia 

 without rhizoids were described, comparison of any significance is 

 hardly possible. 



No zoospore discharge was seen in any of the British or American 

 material. The peglike endobiotic part resembles that formed by a species 

 of Phlyctidium. 



According to Dr. C. L. Odam (communication), the hairs are always 

 bifurcated at their termini. The tips are extremely delicate and scarcely 

 visible. 



Chytridium confervae (Wille) Minden 



Kryptogamenfl. Mark Brandenburg, 5: 368. 1911 (1915) 



(Fig. 31 J, p. 496) 



Rhizidium confervae Wille, Vidensk. Selsk. Skr. Christiana (Mat. -Nat. Kl.). 



1899(3): 1, figs. 1-3. 

 Phlyctochytrium confervae (Wille) Lemmerman, Abhandl. Naturwiss. Ver- 



eins Bremen 17(1): 194. 1901. 



