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TENTH REPORT. 
nidulariinales. (Birds’ nest fungi.) 
Fruit-body not large, above ground, cup or funnel shaped, the cup con- 
taining small round bodies (peridioles) which contain the spores. Often on 
dung, decaying straw, wood, etc. Only one family is included. 
Nidulariaceae. 
Key to genera. 
(a) The opening to the cup is covered at first by a thin membrane. Peri- 
dioles are attached to a long cord (funiculus.) (b) 
(a) Opening without a membrane 1. Nidularia. 
(b) Opening of cup without a margin 2. Crucibulum. 
(b) Opening of cup with margin 3. Cyathus. 
Crucibulum vulgare Tub, Cyathus stercoreus (Schr.) DeToni, and Cyathus 
vernicosus D. C. are the only three species reported. The order needs 
attention. 
University of Michigan, April 1, 1908. 
