CHYTRIDIALES 479 



mud that flourished on chitinous substrata. Growth on chitin appeared 

 more normal than on the vegetable matter. 



Karling (1949c) reported a strongly polycentric chytrid bearing only 

 intercalary resting spores. He suggested that it might be Polychytrium 

 aggregation, but could not verify this because no sporangia were ob- 

 served. Inasmuch as the thallus bears numerous intercalary swellings, 

 which Ajello's fungus does not, Karling's form probably belongs else- 

 where, perhaps in the Catenariaceae (p. 650). 



It is abundant in bogs in Northern Michigan where it is obtained on 

 shrimp chitin bait. 



COENOMYCES Deckenbach 

 Scripta Bot. Horti Univ. Imper. Petro., 19: 115. 1902-3; Flora, 92: 265. 1903 



(Fig. 30 B-E, p. 474) 



Thallus epi- and endobiotic, eucarpic, consisting of a filamentous 

 branched segmented loose hypha-like complex of tubes bearing occa- 

 sional irregular intercalary swellings; sporangia inoperculate, borne 

 extramatrically at the tips of hyphal branches or occasionally sessile on 

 the host cell; zoospores posteriorly uniflagellate, emerging fully formed 

 through a single (rarely more than one) long discharge tube; resting 

 spores not observed. 



A monotypic genus, known only in gelatinous material of blue-green 

 algae. 



Jaczewski (1931: 32) proposed a new generic name, Deckenbachia, 

 nom. nov., for Coenomyces. The reasons for this change are not given 

 in the Russian text, but presumably the name Coenomyces is preempted 

 and is therefore a homonym. 



Coenomyces consuens Deckenbach 



Scripta Bot. Horti Univ. Imper. Petro., 19: 15, pis. 1-2. 1902-3; Flora, 92: 



265, pis. 6-7. 1903 



Mycelium divided by cross walls into long segments, much branched 

 extramatrically and bearing frequent irregular swellings, the endobiotic 

 part less branched, lying between the cells and the sheath of the alga, 



