ing bands.

_Trichia decipiens_ (Pers.) Macbr., p. 276.

Fig. 2. Sporangia, x about 8.

Fig. 2 _a_. A spore of the same species, x 1400.

Fig. 2 _b_ and 2 _c_. Elaters of the same species, x about 225.

_Trichia varia_ (Pers.) Rost., p. 270.

Fig. 3. Sporangia, x about 8.

Fig. 3 _a_. A spore of the same species, x 1000.

Fig. 3 _b_. An elater of the same species, x 750.

_Trichia scabra_ Rost., p. 271.

Fig. 4. Sporangia, x about 8.

Fig. 4 _a_. A single spore of the same species, x 1400.

Fig. 4 _b_. An elater-tip of the same, x 1400.

_Trichia favoginea_ (Batsch) Pers., p. 272.

Fig. 5. Sporangia, x about 8.

Fig. 5 _a_. A single spore of the same, x 1400.

Fig. 5 _b_. A single elater-tip of the same, x 1400.

_Trichia persimilis_ Karst., var _abrupta_ Cke., p. 271.

Fig. 6. An elater-tip, x 1400. It will be noticed that the spirals are
connected by vertical bars.

Fig. 6 _a_. A single spore of the same variety, x 1400.

Fig. 6 _b_. A single spore, from the same sporangium as 6 _a_.

Fig. 6 _c_. Trichia persimilis, a single spore, x 1400.

Fig. 6 _d_. Tip of an elater from the same, x 1400.

[Illustration: PLATE IV]

EXPLANATION OF PLATE V

_Lamproderma arcyrionema_ Rost., p. 197.

Fig. 1. A single sporangium seen as if in section, x 40.

Fig. 1 _a_. A single spore, x 1400.

_Lamproderma scintillans_ (Berk. & Br.) List., p. 195.

Fig. 2. A single sporangium seen as in section, x 40.

Fig. 2 _a_. A single spore, x 1400.

_Enerthenema papillatum_ (Pers.) Rost., p. 190.

Fig. 3. An expanded, blown-out sporangium, x 25.

_Lamproderma robustum_ Ell. & Ev., p.

Fig. 4. A sporangium seen as in section, x 20.

Fig. 4 _a_. A single spore, x 1000.

_Comatricha laxa_ Rost., p. 177.

Fig. 5. A sporangium seen as if in section, x 40.

Fig. 5 _a_. A single spore, x 2000.

_Diachaea thomasii_ Rex, p. 188.

Fig. 6. Three sporangia magnified about 15 times.

Fig. 6 _a_. A single spore of the same species, x 800.

_Brefeldia maxima_ (Fries) Rost., p. 154.

Fig. 7. A group of sporangia, showing columellae; x 5.

Fig. 7 _a_. Capillitial threads of the same species, x 300.

Fig. 7 _b_. Spore of the same species, x 1500.

_Amaurochaete fuliginosa_ (Sowb.) Macbr., p. 149.

Fig. 8. A bit of so-called capillitium, x 300.

Fig. 8 _a_. A single spore magnified about 1000 times.

[Illustration: PLATE V]

EXPLANATION OF PLATE VI

_Comatricha typhoid