PLATE 29 
Cahatia polygonia: 
A. —Two fresh fruiting bodies showing the character of the peridium at different 
stages. The fruiting body at the right is 30 cm. in diameter and is a little older than 
that at the left. Yuma, Colo., July 20, 1907. 
B. —An old fruiting body dried in place, showing the thick peridium scales. 
Diameter 28 cm. 
C. —A large fruiting body 30 cm. across, which for some reason has split open during 
the early growth period. The dry air has cured the tissue before mature spores were 
formed. Fruiting bodies of this fungus are often found in this condition. Akron, 
Colo., July 7, 1909. 
