100 THE LOWER FUNGI— PHYCOMYCETES 



method of svvarinspore discharge. In Nowakowskia according 

 to Borzi the sporangial wall disintegrates leaving the swarm- 

 spores in a spherical Volvox-Vike mass which retains its form and 

 rotates for a time, the spores finally separating from one another 

 and swimming away. 



21. Sporophlyctis Serbinow (Srripta Bot. Hort. Univ. Petrop., 

 24: 116, 164, 1907). 



Erected on the single species, *S. rostrata Serbinow, found on 

 Draparnaldia in Russia. It has been collected also in America 

 (Graff, 1928:158). 



22. Polyphagus Nowakowski (1876: 203). 



Erected on the single species, P. euglenae Nowak., parasitic 

 in Euglena and Chlamydomonas. The fungus is thoroughly dis- 

 cussed by Wager (1913), who outlines the sexual process as 

 follows. Two cells, not differing morphologically from the 

 vegetative cells, function as sex cells. The male cell, which is 

 usually somewhat smaller than the female, puts out a slender 

 pseudopodium-like process which comes in contact with the 

 female cell and fuses with it. The zygote is formed in the tip 

 of this tube, the contents of both male and female cells passing 

 into it. A smooth or spiny wall is then formed on the zygote, 

 and it assumes the spherical form of the mature resting spore. 



Cladochytriaceae 



The members of this family correspond with the Rhizidiaceae 

 in the possession of a definite mycelium, but here it is wide- 

 spreading and usually bears more than a single sporangium. 

 Terminal and intercalary enlargements, formed throughout the 

 mycelium, are transformed wholly or in part into sporangia or 

 resting spores. 



Key to Genera of Cladochytriaceae 



I. Sporangiospores non-ciliate, amoeboid. 



1. Amoebochytrium, p. 101 



II. Sporangiospores ciliate. 



A. Sporangia formed from enlargements of the mycelium, terminal or 

 intercalary; resting spores rare or absent. 

 1. Sporangium opening by a lid, proliferating. 



2. Nowakowskiella, p. 101 



