s_, classification of, 74.
habitats of, 241.
structure of, 50.
_Podaxinei_, structure of, 29.
_Podisoma_, and its allies, 40, 72.
and _Roestelia_, 203.
germination of, 147.
Poisonous fungi, 209.
Polymorphism, 182.
Polymorphy in _Erysiphe_, 191.
Polyporei, structure of, 23.
_Polyporus_, edible species, 96.
Potato disease, 225.
mould, germination, 155.
Preservation of fungi, 288.
Pseudospores, 126.
_Puccinia_ and _AEcidium_, 199.
_Puccinia_, germination of, 145.
_Pucciniaei_, structure of, 38.
Puff-balls, edible, 98.
Puff-balls, structure of, 29.
spores, 123.
Pycnidia, 62, 180.
and spermatia, 62.

_Roestelia_ and _Podisoma_, 203.
Red rust and cattle food, 217.
Reproduction, sexual, 163.
_Rhizomorphae_, 111.
_Russula_, edible species of, 93.

St. George's mushroom, 85.
_Saprolegnei_, conjugation of, 168.
_Sclerotia_, 47, 261.
cultivation, 261.
Scolecite in _Peziza_, &c., 173.
Septate stylospores, 124.
Sexual reproduction, 163.
Silkworm disease, 220.
Skin diseases and fungi, 212.
Slides for the microscope, 290.
Spawn of fungi, 256.
Special cultivation, 264.
Species determinate, 5.
Spermatia, 128, 179.
of _Roestelia_, 42.
in _Tremella_, 26.
Spermogonia, 178.
_Sphaeria_, sporidia of, 133.
_Sphaeriacei_, structure of, 61.
_Sphaeriae_, polymorphy, 192.
_Sphaeronemei_, structure of, 35.
Spiral threads, 32.
Spontaneous generation, 3.
Sporangia, 51, 129.
of _Mucor_, 51.
Spores in chaplets, 143.
of _Agaricini_, 121.
_Gasteromycetes_, 122.
truffles, 130.
stellate and crested, 36.
their dissemination, 119.
Sporidia, germination of, 160.
of _Ascomycetes_, 130.
_Sporidiifera_, structure of, 50
_Sporifera_ and _Sporidiifera_, 64.
Star-spored fungus, 125.
Structure of fungi, 17.
_Agaricini_, 17.
books written upon, 63.
of _AEcidiacei_, 41.
_Ascomycetes_, 55.
_Caeomacei_, 36.
_Hyphomycetes_, 42.
_Hypogaei_, 29.
_Melanconiei_, 35.
_Mucedines_, 44.
_Mucor_, 50.
_Myxogastres_, 31.
_Nidulariacei_, 34.
_Perisporiacei_, 62.
_Phalloidei_, 28.
_Physomycetes_, 50.
_Podaxinei_, 29.
_Polypore