212 
THIRTEENTH REPORT. 
from a very tine, pure clay, on which plants grow poorly, located about 
a mile from the plat used in this investigation. It may be added 
further, that live species in the list here given, are the same as those 
reported by Oudemans and Koning (4) in 1901, found in a forest soil 
near Amsterdam. Holland. 
NAMES AND STRUCTURAL CHARACTERS. 
The following is the complete list of fungi found, so far as they have 
been identified at the present time. The list is not believed to contain all 
the species present in the soil studied. Probably many otlibrs could be 
isolated bv further studv. 
*/ V 
PITYCOMYCETES. 
u.. 
Mucor (species?) 
HYPHOMYCETES. 
*Myceliophthora < species?) Cost. 
Coccospora (species?) Wallr. 
*Fusarium-Cephalosporium (species?) Link-Corda. 
**Acrostalagmus cinnabarinus Corda. 
*Pachybasium hematum (Bonord). 
**Aspergillus calyptratus, Otidem. 
** Aspergillus nidulans Eidam. 
**Aspergillus glaucus Link. 
*Penici Ilium glaucum Link. 
*Penicillium bicolor Fries. 
*Penicillium candidum Link. 
**Penicillium humicola Oudem. 
*Hormodendron cladosporioides Fres. 
** Sty sail us stemonites (Ik) Corda. 
Two or three forms are still unidentified. Those starred once, are 
species found also by Mr. Grossman in a clay soil in Ann Arbor. The 
ones starred twice, were also found by Oudemans and Koning in forest 
soil near Amsterdam. I shall not attempt in this paper to present draw- 
ings and descriptions of these forms. These will appear in the complete 
publication. 
A few general comments only are offered at this time. By far the 
most abundant form found, was the Fusarium, which showed a charac- 
teristic pinkish white mycelium and sickle shaped spores, borne on short 
side branches. These simple fructifications were found to develop later 
into a Cephalosporin m stage, which showed globular heads of spores, 
inclosed hi greater or less quantities of slime. This transition was quite 
distinct, and seems to confirm entirely the idea of a Cephalosporinni 
stage of F usa ri inn. 
Moreover, this Fusarium is believed to be the cause of a fatal wilt 
disease, which was found affecting many garden flower plants, growing 
near the experimental plat. This belief is based on the following evi- 
dence: Stems of the wilted plants were sterilized on the outside by being 
placed for one or two minutes in a .1% solution of bichloride of mer- 
