ASPERGILLUS FUMIGATUS, A. NIDULANS, A. TERREUS N. SP. 85 
The conidia found are mostly globose and range in diameter from 2.5 
to 4.5 M- 
A species in the avellaneus series which has been intensively studied 
will be discussed first. The name Aspergillus terreiis is proposed for 
this species, which has been under observation for about five years. 
It was first studied from soil cultures made by Prof. W. M. Esten in 
Connecticut. It was afterward found in soil cultures by Mr. F. M. 
Scales in Virginia and California, by Mr. S. A. Waksman in New 
Jersey, and by Mr. F. C. Werkenthin in Texas. It has been isolated 
from feces by Mr. G. W. Turesson at Seattle, Washington, from decay- 
ing avocado in Florida by Prof. H. S. Fawcett, and by the writers 
from decaying forage in Kansas, from cornmeal ground in Indiana, 
from musty tobacco, from waters bottled on the American mainland 
and in Porto Rico, as well as from numerous chance inoculations. 
It is readily recognized and not uncommon in routine cultures from 
decaying and soil-contaminated substances. 
Some of the cultures obtained reproduce the morphology and 
reactions of the strain first studied within the degrees of variation 
found in successive transfers of the same pure culture. With the 
accumulation of material, however, we find ourselves with a series 
of related strains rather than a single organism. These vary in colony 
characters and in details of reaction but present close resemblances 
in essential characters which render separate descriptions for most 
of them impossible, as in the case of the forms of A. niger? It is 
entirely possible that investigation, strain by strain, might show 
equally conspicuous differences in their activities as among the black 
forms. A technical description has, therefore, been drawn in broad 
enough terms to include the more closely related of these forms. 
Whether some of them may ultimately be separated as varieties, 
upon physiological grounds, is not determined. 
A. terreus Thom^ 
Colonies upon Czapek's solution agar from tints of pinkish cinna- 
mon through cinnamon (at times near avellaneus of Saccardo's 
2 Thorn, C, and Currie, J. N. Aspergillus niger group. Journ, Agr. Res. 7: 
1-15. 1916. 
3 Published without description marked Thorn MS. by Gote Turesson in Svensk 
Botanisk Tidskrift 10: 5 et seq. 1916, in his discussion of "The presence and 
significance of moulds in the alimentary canal of man and higher animals." 
