Fig. 2 b. Persistent apices of the peridia.
Lindbladia effusa (Ehr.) Rost., [p. 204.]
Fig. 3. A group of sporangia, × 30.
Fig. 3 a. A single spore, × 1400.
Tubifera ferruginosa (Batsch) Macbr., [p. 206.]
Fig. 4. A group of sporangia, × 5.
See also [Plate VII]., Fig. 8; and [Plate XII]., Fig. 14.
Cribraria dictydioides Cke. & Balf., [p. 222.]
Fig. 5. Three sporangia, × 15.
Fig. 5 a. A single sporangium, to show reticulate thickening, × 60.