1913] GODDARD—SOIL FUNGI 263 
These characters correspond much more closely to M. ambiguus. Consider- 
ing all its characters, it was decided to refer it to that species. 
is form was found very abundantly in all the cultures made. Its 
abundance was exceeded only by that of Fusarium sp. 
Myceliophthora sulphurea, n. sp.— Mycelium at first orbicular, 
white, loose, and tufted in the center with a radiate border; becomes 
sulphur yellow and 
finally zoned with pale 
yellow or white center, 
alternate white and 
yellow ridges, and a 
white, radiate border; 
reverse side orange 
yellow; medium little 
colored. Hyphae 
branched, septate, 
hyaline, 3-4 uw broad, 
easily falling apart into 
oidia-like segments of 
very variable size and 
form, some rounding 
up into oval or globu- 
lar conidia, others 
remaining as undiffer- 
entiated cells. Conidio- 
phores scarcely differ- 
entiated from the 

mycelium; sometimes Fic. 2.—Mucor ambiguus Vuill.: a-c, sympodially 
whole hyphae break séaliteat cee stamien X80; d-f, racemose — 
up into oidia, in other "@™siophores, X80; g, mixed racemo ose-sympodial 
ae sporangiophore, X 180; a columellas, X 180; 7, spores, 
cases rows of conidia, “ ay . 
with yeastlike branch- 
ing, form at the ends of certain branch hyphae. Conidia exceedingly 
variable, from undifferentiated cells to oval globular spores 5—10X 
10-16 w in diameter; no chlamydospores.—Fig. 3. 
The vegetative appearance of this form is very characteristic si very 
erke but the spores and method of fructification are and very 

ur 
