66 Wisconsin Academy of Sciences, Arts, and Letters. 
EXPLANATION OF PLATE IV. 
All figures were drawn with the aid of the Abbe camera lucida. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
I 
Fig. 6. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
The spore of Hypholoma perplexum previous to germination. 
X 2700. 
Spore of Hypholoma perplexum with a short germ tube which 
has received a single nucleus from the spore. X 2700. 
Spore of Hypholoma perplexum with a short germ tube which 
has received both nuclei from the spore. X 2700. 
Same as Fig. 2. 
The nuclei : a germ tube of Hypholoma perplexum show late 
division figu/es. X 2700. 
One nucleus, in a germ tube of Hypholoma perplexum , is in 
the equatorial plate stage of division. X 2700. 
Spore of Caprinus ephemerus with a short germ tube contain¬ 
ing several nuclei. X 2700. 
Same as Fig. 8. 
A germinating spore of Caprinus ephemerus at the end of six¬ 
teen hours. X 2700. 
