MYCOLOGICAL NOTES FOR 1920 173 
Explanation of plate 9 
Fic. 1, Enlarged Lig ahs 3 of a small area of the resin exudate on which 
Zythia resinae (Ehrenb.) Karst. and Biatorella resinae (Fr.) Mudd. grow side 
by side. The elongate bodies in the left hand corner are the pycnidia of the 
Zythia, while the larger disk-shaped bodies to the right are the apothecia 
of the Biatorella. Photographed with Micro-Tessar 10 X lens, by E. T. Kirk. 
1G. 2, Resin exudate inhabited by the pitch midge and bearing the 
fruiting Godin of Zythia resinae and Biatorella resinae, X 1. Photo by the 
writer 
Fic. 3, Solenia fasciculata (Pers.) Fr., showing the isolated white-tipped ~ 
cylinders in which the hymenium is produced. Photographed with Micro- 
Tessar 10 X lens, by C. B. Neblette. 
Fic. 4, Pilacre Petersii B. & Br., natural size, Photo by the writer. 
Fic. 5, Rounded abnormal growth of Polyporus campactus Overholts, 
as usually found on vertical yauare and bearing only the chlamydospore 
condition, X 1. Photo by the wr 
Fic. 6, Poroid form of Rania compactus, apa the largely resupi- 
nate manner of growth, X I. Photo by C. B. Neblet 
