66 4 Fritsch . — Two Fungi on Tolypothrix . 
Fig. 24. The internal mycelium branched ; a chlamydospore has been formed 
on the simple portion, x 600. 
Fig. 25. Internal mycelium branched; an infecting-hypha has been developed, 
x 760. 
Fig. 26. Two chlamydospores are growing out to form long external hyphae. 
x 750. 
Fig. 27. Young stages in the formation of external chlamydospores. x 750. 
Fig. 28. Later stages in chlamydospore-formation. x 750. 
Fig. 29. An isolated chlamydospore with a portion of the external mycelium, 
x 760. 
