88 
CHARLES THOM AND MARGARET B. CHURCH 
capable of growing into soil to considerable depths and even capable 
of producing spores under conditions in which many fungi fail to fruit 
at all. 
The tabulated data (Table i) from these comparative cultures show 
that these organisms, which were selected because they are constantly 
obtained in studies from the soil, are capable of actively growing within 
the soil. 
Table i 
Comparative Cultures of Organisms in Different Kinds of Soils 
Name 
Race 
Clay Soil, Depth in 
Cm. 
Sandy Soil, Depth in 
Cm. 
Greenhouse Loam, 
Depth in Cm. 
Spore^ 
Visible 
IV e cove red, 
in Culture 
Spores 
Visible 
Recov- 
ered, in 
Culture 
Spores 
Visible 
Recovered, 
in Culture 
3565 
* 
* 
Surface 
5 cm. 
Surface 
A. davatus 
4083 
* 
* 
* 
* 
5 cm. 
A . Jlavus 
128 
5 cm. 
2 cm. 
5 cm. 
3.5 cm. 
1763 
* 
* 
* 
* 
Surface 
0 at 5 cm. 
inter- 
stices 
2750 
1.5 cm. 
1.5 cm. 
5 cm. 
4 cm. 
3557-6 
* 
* 
* 
Surface 
5 cm. 
3557.9 
* 
* 
* 
* 
4 cm. 
A . fumigatus 
4006.2 
* 
* 
* 
* 
4.8 cm. 
118 
Surface 
5 cm. 
5 cm. 
5 cm. 
* 
* 
2496 
Surface 
* 
* 
* 
* 
A. nidulans 
4010.4 
* 
5 cm. 
5 cm. 
* 
* 
113 
Bottom 
Surface 
5 cm. 
4 cm. 
of tube 
5 cm. 
A. terreus 
144 
* 
* 
3 cm. 
3 cm. 
* 
* 
Ra42 
5 cm. 
Surface 
5 cm. 
4 cm. 
3533 
Surface 
5 cm. 
5 cm. 
0 at 5 cm. 
Penicillium 
(Citromyces) . . . 
2467 
* 
Interstices 
5 cm. 
* 
* 
Penicillium 
(Citromyces) . . . 
4019.2 
* 
* 
Interstices 
5 cm. 
* 
* 
Penicillium 
(Citromyces) . . . 
4083 
Bottom 
5 cm. 
0 not at 
of tube 
4.3 cm. 
5 cm. 
P. luteum 
II 
* 
* 
2.8 cm. 
5 cm. 
* 
* 
P. pinophilum .... 
I 
Bottom 
5 cm. 
5 cm. 
Surface 
5 cm. 
of tube 
1; rrn. 
* No information. 
The literature was searched to find a name and description appli- 
cable. In form and habit of colony A. terreus resembles A. fumigatus 
