Fig. 1 b. A capillitial thread, × 1000.

Physarum polycephalum Schw., [p. 95.]

Fig. 2. The sporangia, × 10.

Fig. 2 a. Spores, × 750.

Fig. 2 b. Capillitium, × 750.

Leocarpus fragilis (Dicks.) Rost., [p. 112.]

Fig. 3. Sporangia, × 6.

Fig. 3 a. A group of sporangia, natural size, to show habit.

Fig. 3 b. A single spore, × 1800.

Physarella oblonga (Berk. & C.) Morg., [p. 109.]