128 
Mycologia 
TABLE I 
Summary of Effect of Desiccation on Ascospore Expulsion 
Period of Desicca- 
tion 
No. of 
Pieces 
Showing 
Expulsion 
Day of Test 
on Which 
ist Ex- 
pulsion 
Occurred 
Day of Test 
on Which the 
the Last Trap 
Began to Show 
Active Ostioles 
Maximum No. 
of Active 
Ostioles 
per Day on 
Any Trap 
Duration of Test 
I 
mo., 13 days 
5 
2 
II 
lOO-l- 
I 
mo., 12 days 
2 
“ 3 “ 
6 
2 
26 
72 
I 
“ 15 " 
3 
“ 3 “ 
6 
19 
24 
200 + 
I 
“ 3 “ 
4 
S 
21 
58 
200 
2 
“ 18 " 
s 
“ 9 “ 
6 
23 
54 
200+ 
2 
“ 2 “ 
6 
“ 13 “ 
5 
30 
39 
200 
I 
“ 28 “ 
8 
“ 3 “ 
S 
38 
48 
40 
2 
“ 3 “ 
8 
“ 17 “ 
6 
30 
38 
300+ 
I 
“ 20 “ 
9 
“ 14 " 
6 
20 
29 
250+ 
I 
“ 6 “ 
10 
“ 14 “ 
6 
17 
22 
200+ 
I 
II 
“ 18 “ 
6 
18 
21 
250-i- 
I 
never more than one in any set in which no active ostioles were 
present. After one and two months of drying, certain perithecia 
began to expel spores on the second day of the test, but with 
longer desiccation the initiation of the process was considerably 
delayed, the number of days required varying from 17 to a maxi- 
mum of 38. Even during the early part of the desiccation period 
TABLE II 
Record of Typical Specimens Showing Characteristic Increase in the 
Activity of Spore Expulsion 
No. of 
Nos. of Specimens and the Number of Active Ostioles on Successive Days 
Day 
339 
345 
347 
373 
384 
387 
393 
394 
I 
4 
3 
3 
7 
2 
10 
15 
12 
2 
5 
4 
2 
24 
20 
30 
18 
30 
3 
II 
9 
6 
50 
30 
90 
42 
52 
4 
13 
32 
16 
85 
60 
250 
80 
78 
5 
28 
35 
23 
80 
65 
250+ 
100 
80 
6 
41 
154 
31 
175 
75 
130 
60 
7 
60 
158 
46 
300 
100 
150 
65 
8 
69 
178 
47 
300 + 
100 + 
100 
15 
9 
89 
150 
54 
15 
10 
II 2 
193 
58 
14 
II 
97 
200 + 
63 
150 
17 
12 
68 
200 + 
67 
150+ 
13 
13 
119 
“ 
61 
* * 
14 
172 
73 
15 
126 
‘ 
76 
the beginning of spore expulsion was considerably delayed in 
some of the specimens. The day of the test on which the last 
