148 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
vation for several years and the complete life histories followed through 
many times. 
Description of Cultures. 
The writer has restricted his studies largely, although not entirely, 
to prostrate and encrusting species of Hymenomycetes, as they have 
been least studied in cultures. Considerably over one hundred species 
of Thelephoraceae, Hydnaceae, and Polyporaceae were collected and 
attempts made to germinate the spores. About seventy-five species 
were successfully cultivated. Six of this number possess secondary 
methods of reproduction of especial importance: Corticium efjuscatum 
and Corticium roseo-pallens produce mycelial conidia of great interest; 
Aegerita Candida is the imperfect form of a new Peniophora; Miclne- 
nera artocreas is the secondary reproductive condition of Corticium sub- 
giganteum; the mycelium of Corticium alutaceum forms bulbils in 
great profusion; Lentodium squamulosum produces peculiar conidia 
about'the margin of the pileus and upon the protruding hyphae of the 
trama. Each of the species above mentioned will be discussed in 
detail in the following pages. In addition to these more definitely 
characterized methods of reproduction, either oidia or mycelial 
chlamydospores were found in a considerable number of species, but 
in no case did the same species possess both. 
Unfortunately, in removing the writer’s effects from Cambridge> 
Massachusetts, to Hanover, New Hampshire, the notes were lost 
which described the germination and cultivation (including the forma¬ 
tion of oidia and chlamydospores) of almost two thirds of the seventy- 
five species studied; consequently the information which can be 
presented as to the occurrence of these simpler types of spores is 
more incomplete than it would otherwise have been. 
The records are preserved for the following twenty-eight species: — 
Corticium vagum B. & C., C. efjuscatum C. & E., C. roseo-pallens 
Burt, C. subgiganteum Berk., C. alutaceum (Schrad.) Bres., C. roseum 
Pers., C. atrovirens Fr., Coniophora suffocata Peck, Peniophora Candida 
(Pers.) Lyman, P. pertenuis (Karst.) Burt, Stereum gausapatum Fr., 
Hydnum sp. (?), PI. ochraceum Pers., Irpex sp. (?), Phlebia sp. (?), 
Radulum tomentosum Fr., Pomes leucophaeus Mont., Polyporus 
jumosus Fr., P. adustus (Willd.) Fr., P. brumalis (Pers.) Fr., Poly- 
stictus conchijer Schw., P. versicolor (L.) Fr., Poria sp. (?), P. spissa 
