436 



N. E. Stevens — Petrified Falms. 



species^ (Peronosporoides palmi and Cladosporites oligo- 

 caenicum) in Palmoxylon cellulosum Knowlton. The 

 writer found fungus hypliae in Palmoxylon anchorus^ and 

 published some notes as to the apparent effect of the 

 fungus on the wood. Hyphae are also abundant in certain 

 parts of both species discussed in this paper. In P. 



Figs. 6 and 7. — P. cheyennense, oblique bundles. X 45. 



clieyennense occur hyphae of two distinct types. Some 

 are fine and without evident septations ; others, much 



^ Berry, E. W., Eemarkable Fossil Fungi. Mvcologia 8, pp. 73-78. 1916. 

 = Stevens, N. E., this Journal (4), vol. 34, pp. 421-4.36, 1912. 



