Fig. 6 a. A single spore, × 1000.

See also [Plate XIV]., Fig. 3.

Physarum auriscalpium (Cke.) Lister, [p. 90.]

Fig. 7. A single sporangium, × 20; a New York specimen.

Fig. 7 a. A single spore, × 1000.

Arcyria nodulosa Macbr., [p. 252.]

Fig. 8. Capillitial thread, × 1200.

EXPLANATION OF PLATE IV