ASPERGILLUS FUMJGATUS, A. NIDULANS, A. TERREUS N. SP. 97 
2. A. psetido-nidulans Vuillemin.^^ — Asci 9 by 14 m; ascospores 
4 by 4.5 M> lenticular, with double equatorial bands, these being 
extensions near the edges of the valves of the ascospore. Vuillemin 
regards this as the form which Grijns reports as an ascosporic A. 
fumigatus. The double character of the equatorial band is so distinct 
that it is difficult to believe that Grijns failed to see it if present. 
The possibility of finding Grijns's organism with a single equatorial 
band therefore remains open. 
We have three variations of this ascosporic series distinguished as 
follows : 
3. No. no, received from Dr. Westerdijk at Amsterdam. Asci 
ripening slowly a few at a time over a period of several weeks, 10-13 m 
in diameter; ascospores lens-shaped, about 4-5 m in diameter and 
3~3-5 M in thickness with a plaited, folded, or wrinkled equatorial 
band as a free extension of the margin of each valve to a width of 
1. 5-1. 8 At (the double equatorial band of authors). 
4. No. 41 10, from flax straw and the same, No. 131, from soil, 
shows perithecia full of ripe ascospores within a few days; the asci 
mostly break down quickly, leaving the perithecium full of free asco- 
spores; ascospores measuring as in No. no, except that the equatorial 
bands are i or less in width. 
5. No. 4138T11 differs from No. 41 10 in the appearance of ridges 
and folds on the valves of the ascospore. It was obtained by Waks- 
man from New Jersey soil. 
Synopsis of Whole Group 
A. Green series. 
B. Sterigmata simple. A. fumigatus series. 
Characterization page 90. 
C. Relationship to .4. /wmiga/w^ distinct. 
D. Ascospores known. 
E. Ascospores with double band. 
1. Asci 14-18^1; ascospores 6- 
8 in longest diameter. . .A. maligntis Lindt 
2. Asci 10-12 ^t; ascospores 
-7 in longest diameter, 
B. C. No. 4188.21. 
3. Asci 20-26/^x12-18^1; as- 
cospores 3-3.5 M A. fiimtgatoides B. & S. 
EE. Ascospores with single band. 
26 Cf. A. fumigatus Grijns, Centralbl. Bakt. II. 11: 330. 1903. 
