OHIO STATE ACADEMY OF SCIENCE. 45 
found in the limestone of Coal No. 4 at Zoar, Tuscarawas 
Gas, ‘Ohio. 
The rounded overlapping mycelia are parted from each 
other by a layer of coal 1-16 of an inch thick, showing by 
new attempts of invasion under the bark, that the tree tried 
by overgrowing one mycelium to exclude a further intru- 
sion, but about 15 mycelia succeeded to locate at the place. 
