696 - The American Naturalist. [August, 
II. ACTION OF THE SPORE-FORMING SACCHAROMYCES ON DIF- 
FERENT KINDS OF SUGAR 
CH O 
Invert sugar formed| Ç H 
6 12 6 and the 
[9] 
12 22 n | Maltose. |Lactose. 
nvertin fermente 
erevisiae I. 
S Pastorianus I-III. } 
IL 0. 
ae exi E: 0. Lorum db. 0. 0. 
EX Joenna S. Ludwigii.| 
0 signifies no fermentation; — signifies a fermentation. 
III. SIZE AND NUMBER OF SPORES. 
No. Spores. | | No. Spores. 
used above. Diameter. Number. || used above. Diameter. Number. 
1 2,5—6». 1- 5. [V ORE 
2 1,5-5y. 1-10, 13 1-2,55. 2-4. 
8 2-5p. 1l- 7. 14 
4 2—4u. 1-10. 15 1 
5 p. 1- 4. 16 3 
6 2-5p. 1- 4. I 2-4. 
7 2—4n. 18 1,5-5». 1-5. 
8 .2-An. 2- 3. 19 "Er 1-4. 
9 20 2-4. 
10 1- 8. 21 
11 2— 4. 22 
through the life-activity of this or that organism, or enzyme, 
and this mode of expression would also indicate more about 
the process than the terms fermentation or putrefaction are 
able to do. 
The names yeast or yeast-fungi ought to be used exclusively 
on the species of Saccharomycetes, not including the myco- 
derma (cerevisiae and vini—Saccharomyces mycoderma), Tor- 
ula, and those of the moulds which give either no fermenta- 
tion or a fermentation (conversion of glucose) with a large per 
cent. of alcohol. And, finally, the gen yees should 
comprise only the spore-forming species. 
Missourr Boranicat GARDENS, May, 1893. 
