138 
OHIO BIOLOGICAL SURVEY 
EXPLANATION OF PLATE XVI. 
Note: Where no magnifications are given an enlargement of 79 diameters for perithecia, and 450 diame¬ 
ters for hairs, paraphyses, asci, and spores is to be understood. The illustrations were drawn from a 
magnification double that given here and reduced one-half in the process of reproduction. 
1-5. Sporormia minima. 1. Perithecia. 2. Young ascus in outline. 3. Two 
asci showing spore arrangement. 4. Ascus showing cap and how spores 
escape. 5. Mature spore. 
6-13. Sporormia intermedia. 6. Perithecium seen in section. 7. Another form of 
perithecium in outline. 8. Ascus much elongated in water. 9. Mature 
ascus. 10. Lower portion of an opened ascus with one spore. 11. Cap-like 
lid of same ascus with two spores. 12. Mature spore with hyaline envelope 
swollen in water. 13. Spore as seen within inner membrane of ascus. 
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