62 
OHIO BIOLOGICAL SURVEY 
EXPLANATION OF PLATE Vll. 
Arcyria nutans (Bull) Grev. 
Fig. 1. A broken sporangium showing cup and greatly expanded capillitium. 
X 10. 
Fig. la. Portion of capillitium showing network. 
Fig. lb. Small portion of capillitium. X 400. 
Fig. Ic. A spore. X 800. 
Arcyria cinerea (Bull.) Pers. 
Fig. 2. A sporangium with entire wall. 
Enteridium rozeanum Wing. 
Fig. 3. An aethalium. Natural size. 
Fig. 3a. Network'formed by sporangium walls. X40. 
Fig. 3b. A spore. X 800. 
Reticularia lycoperdon Bull. 
Fig. 4. Strands or so called capillitium from a broken aethalium. X 8. 
Dictydiaethalium plumbeum (Schum.) Rost. 
Fig. 5. An aethalium. X 15. 
Fig. 5a. A few sporangia from an aethalium. X 20. (Lister). 
Fig. 5b. A cap and threads of a sporangium wall. X 50. (Lister). 
Fig. 5c. Portion of a thread. X 280. (Lister). 
Fig. 5d. Portion of floor of aethalium areolated with the bases of the sporangia. 
X 50. (Lister). 
Fig. 5e. A spore. X 600. 
(Lister). 
