690 The American Naturalist. [August, 
Found causing a peculiar disease in the yeast. Gives a well 
marked bottom-fermentation. Cells long, oval and ellipsoid. 
Spore-formation: 25° in 28 h., 15° in 35 h. Max. 27°-28° ; Min. 
4?, Top-vegetation never found at 34°, occurs in 9-12 days 
at 20°-22°, the culture giving, when old, very irregular, almost 
thread-shape cells.—Gelatine-culture has round colonies with 
fringed edges. 
` 5. Saccharomyces ellipsoideus I. Hansen. 
Hansen, l. c. II, page 71; Pl. III, fig. 2; Pl. VII, fig. 1-3. 
S. ellipsoideus Reess, l. c. page 82; Pl. III, fig 1-7. Pasteur, 
l. c. page 242, fig. 58. Joergensen, l. c. page 132. Ludwig, 1l. c. 
page 216. [“ Wine-yeast."] 
Found on the surface of grapes. Cells round, oval, ellipsoid ; 
gives bottom-fermentation. Spore formation: 25° in 21 hours. 
15° in 45 h.; maxim. 30°, 5-31°,5; minim. 7?,5. Top-vege- 
tation gives always round and neal, arcel lüg and irregular 
cells, does not occur at 38°, but at 20°-22° in 10-17 days. 
5. Saccharomyces ellipsoideus II. Hansen. 
Hansen, l. e. II, page 71; PL II, fig. 3; Plate VIII, fig. 1-3. 
Reess, Pasteur loci cit. Joergensen, l. c. page 135. Ludwig,l. 
c. page 216. 
Found together with S. Pastorianus III in diseased yeast. 
Gives sometimes top-, sometimes  bottom-fermentation. 
Cells similar to those of S. ellipsoideus I. Spore-formation: 
25° in 27 h., 15° in 70 h. Max. 33°-34°; min. 8?.—Young top 
vegetation gives round and oval cells, occurs never at 40°, at 
20*—22? in 4-6 days; the old vegetation has long cells, and a 
mycelium-like appearance. 
7. Saccharomyces Marzianus. Hansen. 
. Hansen: Annales de Micrographie, 1888, Nr. 2-3, page 3, 1. 
c. page 222, Joergensen, l. c. page 136. Ludwig, l. c. page 219. 
Found on grapes. In beer-wort it gives a number of elliptic, 
egg-formed cells, and later small colonies of mycelium-like 
growth. Spores not easily formed, the latter being generally 
